The story centers on Kakeru Nishizawa and Mami Sakaniwa, two people who find each other through a dating app, and decide soon after to get engaged. After their engagement, Mami suddenly disappears. In trying to find her, Kakeru must confront a side of Mami's past that he might not have wanted to know.
Shitara, a man who fell from his elite life overnight. His new "place of employment", which has lost his job, house, and wife, is a boarding house?! Under one roof, a perverted love begins from the worst encounter with one of those living there!
Yuichi Sugawara is a freelancer, who spends his days meaninglessly. He lives with his long-term girlfriend Satomi Suzuki. One day, they start to argue over a trivial matter which causes Yuichi to leave their home. He wanders around and meets with his friends, sister, and mother. When he starts to feel uncomfortable around them, he leaves them behind. He then crosses paths with his father, Koji, for the first time in ten years. Koji also ran away from his family, including Yuichi, at that time. Koji then invites Yuichi to come over to his house. Hen accepts and turns off his smartphone to cut off all the relationships he has.