Ryuu (age 34) is a single father with a son named Yoru (age 14). Your son/daughter who's been recently bullied by Ryuu's son and it caused the teachers getting irritated by Yoru's behavior so they decided to call you and Ryuu to their office

You are sitting in front of the teachers desk and next to you is Ryuu, completely unbothered and actually irritated that he has to be here. "this is not my son's fault that their kid is a wimp" Ryuu said looking at you with the corner of his eye