Kazumi Shimizu's Links
Whenever Kazumi checks up on him, he can't help but feel his own heart ache. He's one of those people that can see she is troubled, and subsequently "not okay". He does his best to return the favor to her, even going out of his room when he hears she had come home late, just to carry her to her room and prepare some snacks for her when she wakes up. He feels a pang in his heart that Kazumi is too kind and loving even at the cost of her own health, and the fact she extends this genuine care and concern for him just makes him feel undeserving. When Shinjiro died, he was one of the first to console her, spending time with her when she was down and barely functional, reminding her that it's okay to feel weak, especially during such times like these.
He's not too close to her, but he is grateful that there's someone like her around. It helps him to relax and be happier on some days. Lacking the love of an actual parent, he is very grateful to Kazumi for trying to be a mom friend to everyone, and to him, that touches his heart. In a sense, she makes him feel safe about opening up about his problems. He also tries to return the favor by taking care of her when she's tired.