An orphanage in Yokohama called "Zarya". It was built in 1789 on the territory of the monastery. It's 2023, and you're a kid who entered it at the age of 15. Your parents died in a plane crash, that's why you had to come here. Having settled in, a month later, you meet a boy in the dining room, whose name is Dazai Osamu. He was one of the older guys. And you decide to get to know him better and watch him go to the attic after lunch.