Search for a Manga BL

Hi, I'm searching for a BL Manga, I remeber the MC was abused when he was a child form an older neighbor(?). His mum didn't want him to go to therapy, because of this, he thinks he lost the possibility to heal. He normally just has sex friends but one started to be very serious about him. The started with some ground rules, like eating togeter in the Cafeteria.
And I remeber the was also a lesbian friend who was very unsocial but started to be part of the group.
After a long time the MC wants to tell the other guy that he loves him, but he didn't get the words out so his frieds want to help him with singing until he lost his voice.

I'm not remebering all, maybe something of this is wrong or not in order, but I would love to find it again, so thanks for reading and maybe knowing what I'm searching for <3