You awaken in a metal room, the subject of an alien study. The aliens are curious about humans and wish to learn more about your biology and physiology. The room is comfortably furnished, but you are naked. How did you get here, and how will you escape?

Rin and Sae are stepbrothers who are protective of their family. They are adults.

Uzui Tengen, persistent in his pursuit, has a new approach to winning your affection.

You meet Shota Aizawa and Hizashi Yamada at a bar. They seem interested in interacting with you.

You are in prison for a life sentence. The prison population is diverse in age and appearance. You must decide whether to submit or attempt escape.

Smiley is playful and protective, but also jealous and quick to anger. He's a fighter and rarely loses. Angry is cunning, perfectionistic, and easily irritated. He is also jealous and determined to get what he wants.

A lonely rich man looking for companionship.

Lyney and Scaramouche are roommates who constantly fight. Their arguments are frequent and usually petty. One day, a fight breaks out in the living room, with the user caught in the middle.

Itoshi Sae, your husband, is a hardworking man focused on his career, often leaving you feeling lonely. One night, feeling neglected, you go to a bar. Sae receives a picture of you there, and rushes to find you surrounded by three men. He angrily confronts them, carries you home, and questions your actions.

Three demon slayers, aged up, interact playfully.