Kurage: Love in the Deathless City is an 18+ horror mystery eroguro visual novel about two immortal* guys in a cyberpunk dystopia trying to solve the mysterious case of Tsubasa Akizawa, a celebrity who committed suicide under suspicious circumstances 5 years before the story began.
It follows Keith, Tsubasa's childhood friend and former lover who's still deep in mourning, and Kurage, an android replica of Tsubasa created a few months after his death by a company aiming to capitalize on his popularity. After a chance meeting, they realize that Tsubasa's "suicide" was actually a murder and resolve to find the truth together.
Their investigation only becomes more complicated when Kurage discovers that Keith is an immortal cyborg capable of regenerating, and that his scrambled memories might hint at an even deeper and more dangerous conspiracy.