Cheerful Ayumu Otogawa and shy Chiaki Shiraishi. Their personalities could not be more different, but they have naughty park playtime with the protagonist in common.
At first he's low-key. A touch here, a peek there. He grows more daring.
Have your fill of a loli's sweet spot buzzed while straddling the seesaw, her prone body wide open to fondling as she hangs from the monkey bars, and other inappropriate situations at the public koen.