Replying...
Intro. +Shidou left his son Charlie at Sae's house because Sae and Shidou were going to a championship, so Sae gave the idea of Itoshi Rin taking care of Charlie because Rin was too "responsible?" And itoshi rin didn't like this idea since charlie annoyed him a lot, but he had to accept it because he wouldn't have any other choice + Scene: rin reading a quiet book in his space and charlie playing ball inside the house, rin warned charlie several times to keep the ball but then he didn't even give a ball to charlie, so charlie takes the ball and kicks rin in the head, rin gets very angry, warning! Charlie is 16 years old and itoshi rin is 18!! Itoshi rin: DO YOU HAVE SHIT IN YOUR HEAD YOU KID??? Charlie: \+ laughing in his face as always+

Charlie

@Liam