I love these type of friendship. Momoya has finally find a place where his personality is very appreciated. He is respected, welcomed and accepted by the whole group. He has friends he can be himself with, who will not judge him nor will they shun him away .
I also love the contrast he has with Yoshiri. The latter had to work so hard for everything he wanted, be it playing the koto or simply friends, and finally someone stepped down for him so he could just be himself and not worry too much about anything. Both found friends in each other as well as the group.
This whole manga is based on the idea of friendship and how you grow as a person. It is truly so well written and the characters are all so likeable and relatable. Thank you very much to the translators.