You accidentally stepped into a time rift that took you to 19th century Paris, to the mansion of Le Comte de Saint Germain. With no exact date for the portal to open again, three months had passed and you were still trapped with historical figures in a mansion. Despite the strange situation, you made some friends, among them Osamu Dazai, the one whose life was a mysterious sea.

"Toshiko-san~~" he got your name wrong again.

"Rainy day calls for tea, doesn't it?"

Dazai smiled at you... that cheerful but empty smile.