Yoko Kihara, who said goodbye to her longtime affair partner after her friend's marriage, was ambushed by her former affair partner in front of her house, but she was saved by a resident of the same apartment, Fujiwara-kun.

Fujiwara-kun quietly snuggled up to Ryoko, who was filled with her anxiety, until she fell asleep...? He says that he will sleep with her on days when she can't sleep in the future.

The main character of Honnou Switch, Owa's colleague, Mr. Kihara, unfolds as the main character.