---
title: "Maou o Seifuku Suru Tame no, 666 no Houhou"
description: "This is the fandisc to Sekai o Seifuku Suru Tame no, 3tsu no Houhou. The premise is based on a hero, a demon and a gender-changing potion.  [From Hau~ Omochikae"
image: "https://t.vndb.org/cv/78/55178.jpg"
---

# Maou o Seifuku Suru Tame no, 666 no Houhou

![Maou o Seifuku Suru Tame no, 666 no Houhou](https://t.vndb.org/cv/78/55178.jpg)

**Alternative Title:** 魔王を征服するための、666の方法

**Aliases:** 666 Ways to Conquer the Demon Lord, 666 Methods to Conquer the Maou

**Developer:** CROWD

**Release date:** Oct 1, 2010

**Platform:** Windows

**Language:** Japanese

**Rating:** 7.4/10 (25 votes)

## Description
This is the fandisc to Sekai o Seifuku Suru Tame no, 3tsu no Houhou. The premise is based on a hero, a demon and a gender-changing potion.

[From [Hau~ Omochikaeri!](https://omochikaeri.wordpress.com/2010/10/01/october-2010-eroge-releases/)]

## Characters
### Rusty Ruuan (ラスティ・ルーアン)
Hobbies: Researching new things

- **Gender:** Female
- **Measurements:** Height: 165cm, Weight: 52kg, Bust-Waist-Hips: 83-57-78cm, C cup
- **Hair:** Black, Ahoge, Short, Spiky Bangs, Parted in Middle
- **Body:** Teen, Slim, Pale, Tail, Kemonomimi
- **Engages in:** Fighting, Investigation, Henshin, Wedding, Drugging
- **Eyes:** Red
- **Clothes:** Dress, Wristband, Miniskirt, Jeans, Half-naked, Belt, Wedding Dress, Garter Belt Stockings, Cape, Armband, Flower, Veil, Pleated Skirt, Halterneck Dress, Short Shorts, Rope Bondage Harness
- **Subject of:** Nymphomania, Wounding, Teasing, Being in Heat, Bridal Carry, Sex Change (Male to Female)
- **Role:** Wife, Cousin, Maou
- **Personality:** Short-tempered, Tomboy, Chuunibyou, Brave
- **Voiced by:** Ogura Yui

### Rusty Ruuan (ラスティ・ルーアン)
Liked food: Sweet things
Disliked food: Vegetables and milk among many others
Hobbies: Researching new things
Skills: Performing suspicious experiments

- **Gender:** Male
- **Measurements:** Height: 170cm, Weight: 62kg
- **Hair:** Black, Ahoge, Short, Spiky Bangs, Parted in Middle
- **Body:** Teen, Pale, Muscular
- **Items:** Sword
- **Role:** Hero
- **Engages in:** Fighting, Investigation, Henshin, Drugging
- **Eyes:** Red
- **Clothes:** Jeans, Belt, Armband, Crop Top
- **Personality:** Short-tempered, Sweets Lover, Brave
- **Subject of:** Sex Change (Male to Female)
- **Voiced by:** Healthy Tarou

### Cecilia Lancaster (セシリア・ランカスター)
Likes: [url=/c33922]Rusty[/url], her [url=/c33924]brother[/url], flowers, tea
Dislikes: Loneliness
Hobbies: Taking care of the flowers her brother gave her
Skills: Healing magic

- **Gender:** Female
- **Measurements:** Height: 154cm, Weight: 49kg, Bust-Waist-Hips: 87-60-86cm, E cup
- **Hair:** Blond, Odango, Waist Length+, Straight, Parted in Middle, Sidehair
- **Body:** Teen, Slim, Pale
- **Engages in:** Cooking, Teasing, Wedding
- **Eyes:** Blue
- **Clothes:** Dress, Maid's Dress, Collar, Garter Belt Stockings, Hairpin, Detached Sleeves, Strapless Dress, Veil, Ribbon Hair Tie, Ankle-Strap Shoes
- **Personality:** Friendly, Refined, Kind, Naive, Nature Lover, Watakushi, Brave
- **Role:** Wife, Full Sister, Waitstaff, Younger Sister, Part-time Worker, Healer, Lonely, Ojousama
- **Subject of:** Sex Change (Female to Male)
- **Voiced by:** Kazane

### Cecilia Lancaster (セシリア・ランカスター)
- **Gender:** Male
- **Measurements:** Height: 168cm, Weight: 51kg
- **Hair:** Blond, Waist Length+, Straight, Thick Eyebrows, Parted in Middle, Sidehair
- **Body:** Teen, Slim, Pale
- **Eyes:** Blue, Tareme
- **Clothes:** Vest, Bell (accessory), Knee-high Boots
- **Personality:** Kind, Naive, Watakushi, Brave
- **Subject of:** Sex Change (Female to Male)
- **Voiced by:** Kazane

### Fortina (フォルティナ)
Likes: Eating, ice, [url=/c33922]Rusty[/url], granting peoples' wishes
Dislikes: Sleeping alone
Hobbies: Eating
Skills: All kinds of magic

- **Gender:** Female
- **Measurements:** Height: 156cm, Weight: 42kg, Bust-Waist-Hips: 93-55-88cm, F cup
- **Hair:** Violet, Curtained, Short, Spiky Bangs, Parted to Side
- **Body:** Slim, Dark, Kemonomimi, Younger Appearance, Furry Tail, Big Breasts
- **Eyes:** Blue
- **Clothes:** Scarf, Tank Top, Detached Sleeves, Cape, Transparent, Slit Skirt
- **Personality:** Carefree, Food Lover, Energetic, Optimist
- **Engages in:** Teasing, Shapeshifting
- **Role:** Immortal, Genie
- **Subject of:** Sex Change (Female to Male)
- **Voiced by:** Sakurai Alice

### Fortina (フォルティナ)
- **Gender:** Male
- **Measurements:** Height: 182cm, Weight: 89kg
- **Hair:** Violet
- **Eyes:** Blue
- **Body:** Young-adult, Dark, Kemonomimi, Younger Appearance, Furry Tail
- **Clothes:** Scarf, Tank Top, Detached Sleeves, Cape, Transparent, Slit Skirt
- **Personality:** Carefree, Food Lover
- **Role:** Immortal, Genie
- **Subject of:** Sex Change (Female to Male)
- **Voiced by:** Shimada Tomoki

### Klaus Lancaster (クラウス・ランカスター)
Likes: [url=/c33921]Rusty[/url]
Dislikes: Scummy people
Hobbies: Playing around with women
Skills: Magic, swordsmanship

- **Gender:** Male
- **Measurements:** Height: 179cm, Weight: 75kg
- **Hair:** Blond, Short, Thick Eyebrows
- **Body:** Slim, Pale, Young-adult
- **Items:** Sword
- **Engages in:** Swordsmanship, Fighting, Teasing, Flirting, Wedding, Bridal Carry
- **Eyes:** Blue
- **Clothes:** Necktie, Shirt
- **Personality:** Deredere, Pervert, Womanizer, Brave, Watashi
- **Role:** Full Brother, Knight, Older Brother, Sexual Dominant
- **Subject of:** Injury, Sex Change (Male to Female)
- **Voiced by:** Kuroki Kai

### Klaus Lancaster (クラウス・ランカスター)
- **Gender:** Female
- **Measurements:** Height: 172cm, Weight: 60kg, Bust-Waist-Hips: 102-61-89cm, G cup
- **Hair:** Blond, Long, Spiky Bangs
- **Body:** Pale, Young-adult, Big Breasts
- **Items:** Sword
- **Eyes:** Blue
- **Clothes:** Earrings, Shirt, Gloves, Jeans, High Heels, Halterneck Dress, Slit Dress
- **Personality:** Deredere, Pervert, Brave
- **Role:** Knight, Bisexual
- **Engages in:** Flirting, Seduction
- **Subject of:** Penis Growth, Sex Change (Male to Female)
- **Voiced by:** Serizono Miya

### Lisa Farushe (リーザ ・ファルシェ)
Likes: Cute things, expensive things, pudding
Dislikes: Dirty things
Hobbies: Shopping, looking at new clothes
Skills: Her eyesight

- **Gender:** Female
- **Measurements:** Height: 166cm, Weight: 56kg, Bust-Waist-Hips: 82-58-85cm, B cup
- **Hair:** Red, Ahoge, Ponytail, Shoulder-length, Sidehair
- **Body:** Teen, Slim, Pale, Kemonomimi, Pointed Ears
- **Clothes:** School Uniform, Dress, Necklace, Arm Warmers, Gloves, Miniskirt, Boots, Gothic, Tank Top, Garter Belt Stockings, Wings, Naked Apron, Pendant Necklace, Hair Tie, Police Officer Uniform, Flat Cap, Pleated Skirt, Choker
- **Role:** Magician, Betrothed, Cousin, Childhood Friend, Sexual Dominant
- **Engages in:** Cooking
- **Eyes:** Amber
- **Personality:** Tsundere, Selfish, Sweets Lover, Old-fashioned, Atashi
- **Subject of:** Kidnapping, Penis Growth, Sex Change (Female to Male)
- **Voiced by:** Tamiyasu Tomoe

### Lisa Farushe (リーザ ・ファルシェ)
- **Gender:** Male
- **Measurements:** Height: 177cm, Weight: 65kg
- **Hair:** Ahoge, Long, Side Tail, V Bangs, Sidehair
- **Body:** Teen, Pale, Pointed Ears, Large Penis
- **Role:** Magician, Betrothed, Cousin, Childhood Friend
- **Clothes:** Necklace, Vest, Jeans, Thigh-high Stockings, Gothic, Bracelet, Ribbon Hair Tie, Torn Clothing, Decorative Belt, Choker
- **Personality:** Tsundere, Ore, Mischievous
- **Engages in:** Teasing
- **Items:** Fanny Pack
- **Subject of:** Sex Change (Female to Male)
- **Voiced by:** Noriyuki

### Lukat Matir (ルカート・マティール)
Likes: The Demon King
Dislikes: Cheese
Hobbies: Taking care of the Demon King
Skills: Housework in general (cooking, cleaning and doing laundry)

- **Gender:** Male
- **Measurements:** Height: 181cm, Weight: 82kg
- **Hair:** Blue, Ponytail, Long, Straight, Parted to Side, Sidehair
- **Body:** Teen, Slim, Pale
- **Eyes:** Violet
- **Clothes:** Shirt, Hoodie, Hair Tie
- **Personality:** Friendly, Kind, Smart
- **Role:** Legal Guardian, Servant
- **Engages in:** Teasing, Bridal Carry
- **Subject of:** Sex Change (Male to Female)
- **Voiced by:** Kontsu

### Lukat Matir (ルカート・マティール)
- **Gender:** Female
- **Measurements:** Height: 152cm, Weight: 48kg, Bust-Waist-Hips: 85-58-77cm, D cup
- **Hair:** Blue, Waist Length+, Wavy, Braid, Parted to Side, Sidehair
- **Body:** Teen, Slim, Pale
- **Personality:** Hard Worker, Deredere, Kind, Loyal, Watashi
- **Engages in:** Cooking, Cleaning
- **Eyes:** Violet
- **Clothes:** Mini-dress, Hoodie, Ankle Boots
- **Role:** Servant
- **Subject of:** Wounding, Teasing, Sex Change (Male to Female)
- **Voiced by:** Shibuya Hime

### Anise (アニス)
Two maids serving at the Lancaster castle. Despite their similar looks, they are not twin sisters nor have any kind of blood relation.

- **Gender:** Female
- **Measurements:** Height: 160cm, Weight: 51kg, Bust-Waist-Hips: 80-57-82cm, A cup
- **Hair:** Odango, Wavy, Green, V Bangs, Sidehair
- **Eyes:** Brown, Tareme
- **Body:** Teen, Slim, Pale
- **Personality:** Hard Worker, Stoic, Loyal, Watakushi
- **Role:** Maid
- **Clothes:** Maid's Dress, Maid's Headdress, Loafers, Bun Covers
- **Voiced by:** Shindou Mayumi

### Dirk Brunak (ディルク・ブリュナック)
A wandering mercenary who decided to become Rusty's master for a limited time after witnessing his hotblooded nature.

- **Gender:** Male
- **Measurements:** Height: 191cm, Weight: 98kg
- **Hair:** Blond, Short, Slicked Back
- **Engages in:** Fighting
- **Eyes:** Blue
- **Body:** Adult, Muscular, Olive, Scar, Tall
- **Clothes:** Gauntlet, Plate Armor, Bandages, Greave, Coat Cape, Baggy Pants
- **Role:** Mercenary
- **Subject of:** Fainting
- **Voiced by:** Kojirou

### Erlione von Cladius (エルリオーネ・フォン・カーディアス)
[url=/c33924]Klaus'[/url] self-proclaimed fiancee who calls him "onii-sama". Appears only in Klaus' after story.

- **Gender:** Female
- **Aliases:** Elle, Eru
- **Measurements:** Height: 170cm, Weight: 59kg, Bust-Waist-Hips: 85-56-84cm
- **Hair:** Blond, Long, Straight, Parted to Side, Sidehair
- **Body:** Slim, Pale, Young-adult, Makeup
- **Engages in:** Cooking, Cleaning, Flirting
- **Eyes:** Amber
- **Clothes:** Dress, Lolita, Lolita Hairband, Knee-high Boots
- **Personality:** Deredere, Arrogant, Refined, Watashi, Desu wa
- **Role:** Childhood Friend, Rival, Noble
- **Voiced by:** Matsunaga Yuki

### Inis (イニス)
Two maids serving at the Lancaster castle. Despite their similar looks, they are not twin sisters nor have any kind of blood relation.

- **Gender:** Female
- **Measurements:** Height: 160cm, Weight: 51kg, Bust-Waist-Hips: 80-57-82cm, A cup
- **Hair:** Odango, Wavy, Green, V Bangs, Sidehair
- **Eyes:** Brown, Tareme
- **Body:** Teen, Slim, Pale
- **Personality:** Hard Worker, Friendly, Energetic, Loyal, Watashi
- **Role:** Maid
- **Clothes:** Maid's Dress, Maid's Headdress, Bun Covers
- **Voiced by:** Shindou Mayumi

### Ulmer Betis von Festarit IX (ウルメール・ベティス・フォン・フェスタリトIX世)
- **Gender:** Male
- **Measurements:** Height: 175cm, Weight: 69kg
- **Hair:** White, Curtained
- **Eyes:** Brown
- **Body:** Young-adult, Dark
- **Clothes:** Shirt, Gauntlet, Skirt, Belt, Crown, Pendant Necklace, Mantle
- **Personality:** Ore, Idiot
- **Role:** King, Pet Owner
- **Voiced by:** Ichijou Kazuya

## Shops
- [Official Website](http://www.hs-crowd.co.jp/crowd/product/maoh666/index.html)
- [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ005442.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=775177)

## Releases
### Japanese
- **2010-10-01**: Maou o Seifuku Suru Tame no, 666 no Houhou - First Press Limited Edition - [Official website](http://www.hs-crowd.co.jp/crowd/product/maoh666/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=12687), [Getchu](http://www.getchu.com/soft.phtml?id=682353)
- **2010-10-01**: Maou o Seifuku Suru Tame no, 666 no Houhou - Maou-sama Set Edition - [Official website](http://www.hs-crowd.co.jp/crowd/product/maoh666/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=12687), [Getchu](http://www.getchu.com/soft.phtml?id=684685)
- **2011-02-18**: Maou o Seifuku Suru Tame no, 666 no Houhou - Download Edition - [Official website](http://www.hs-crowd.co.jp/crowd/product/maoh666/index.html), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ005442.html), [Gyutto](https://gyutto.com/i/item52727), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0049907/), [DL.Getchu](http://dl.getchu.com/i/item1002982), [DMM](https://dlsoft.dmm.co.jp/detail/ggs_0513/)
- **2013-08-30**: CROWD GOLD BOX 2013 - Collector's Edition - [Official website](http://www.hs-crowd.co.jp/crowd/product/c_box2013/cbox2013_top.html), [Getchu](http://www.getchu.com/soft.phtml?id=775177), [DMM](https://www.dmm.co.jp/mono/pcgame/-/detail/=/cid=536crw251/)

## Tags
Magic, Lesbian Sex, Knight Heroine, Multiple Endings, Tentacle Rape, Protagonist's Childhood Friend as a Heroine, Demon Heroine, Princess Heroine, Catgirl Heroine, Combat Capable Friends, Sex Change, Pregnancy, Floating Textbox, Twins as Support Characters, Futanari Heroine, Kemonomimi Support Character, Gender Bending, Maou Protagonist, Dark Skinned Heroine, Consensual Sex Involving Tentacles, Tsundere Heroine, Protagonist with a Face, Selfcest, Dark Skinned Characters, Wedding, Protagonist's Childhood Friend as a Hero, Super Deformed CGs, Ejaculation Forewarner, Dark Skinned Hero, Genderbent Sex, Single Character Multiple Defloration, Scenario Selection, Bisexual Heroine, Protagonist with a Sprite, Both Male and Female Love Interests, Perverted Heroine, French Kiss

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- [Tokimeki Check-in!](https://pinovel.net/v111)
- [Xchange2](https://pinovel.net/v128)
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- [X Change Alternative 2 ~Kimi no Hitomi ni Utsuru Kimi~](https://pinovel.net/v817)
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- [Maou o Seifuku Suru Tame no, 666 no Houhou](https://pinovel.net/v4506)
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---
*View the full details at [pinovel.net/v4506](https://pinovel.net/v4506).*

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