It's painful so painful, to see how the bullying back then, even after 20 years is still haunting him. When he's envious of Shiori for having friends that actually care about her, apologize to her, but he didn't have anyone during those harsh years. And when Suzuki wants to talk privately with him, but he remembered the times when he was bullied and then he starts hitting his own head. I cried so hard, I feel really sad, thinking that horrible sht like this actually happen irl...
Also that bully, Ai whatever her name is, where did u get such btchy attitude istg?? Like you're the one who messed up and then you're blaming your parents to do better when all you've ever done is being a nuisance???? Be grateful if your parents don't disown you because I swear I'd have slapped u twice before she even get to say anything