A romance story that starts with a 5 year old × a 17 year old. Although he will grow up as the story goes on, erotic stuff happens during when the younger brother is in his shota phase so please take heed. The older brother is not a shotacon but rather, almost. Only vague criminal-like actions until the younger brother grows though…… But he is not a sasoi-uke (TL: sasoi-uke is a type of uke that usually tempts and takes initiative). The younger brother is a cute but innocently good-looking. The story is sometimes serious, sometimes gag.
TL note: Warning: This is seriously a shotacon incest. Younger brother is the seme.