Masaru asks Thoma for a favorc this unbelievable gesture from Masaru involves his little sister, Chika. It is Chika's birthday tomorrow, but since Masaru has to a test to take, he cannot be with her. So, he asks Thoma to be part of his family for one day, and spend the day with his sister. Thoma did not want to be a part of this plan at first, but having special feelings for ""family"", he decides to grant Masaru the favor......
