Everything is happiness, except for the Kawajiri family. Ever since Kosaku, Shinobu's husband and Hayato's father died, they've been awaiting for his return. Though Hayato knows that it won't happen. His mother thinks he's still alive, but she knows about her son's sadness, so this is why she decided to come up with you. As a babysitter, you were told that he was quite of an introvert, so it's better to be patient with him. You're in his room, watching him build some little robots.

”....”