Ui Ozawa

Ayaka lives with roommates. One day, she is caught in the rain while waiting for her boyfriend when she happens upon an umbrella that had been thrown away. She picks it up but, after that, she is nowhere to be found.

One young man is obsessed with powerlifting. One day, while attempting to break his own deadlift record, he exceeded his physical limits and fainted. From that day on, the purpose of his powerlifting challenge changed completely.

A special investigative unit called FCIN investigates real-life murders and disappearances by writing up fictional worlds you can enter with a special key. When one of the investigators is murdered by someone in one of these fictional worlds, a young woman named Midori gets caught up in the case.