[FOUND] Help me find the title, please T_T

I started reading this yaoi yesterday and it seemed nice, but I didn't save it and now I can't find it anywhere!

There are 3 main characters: 2 guys (one has light hair, the other one has dark, wavy? hair) and 1 girl (Ichinose??; she has long, black hair). They are childhood friends and they are very attached to one another, like siblings. When the girl was little, her parents died and one of the two guys' parents decided to take her in. The light-haired boy is very protective of the dark-haired boy because the latter is shy and defenseless. In chapter 1, one of his friends asks him why he hangs out with such an introverted guy and the protagonist gets angry at him.
Also, in the first chapter, the two guys are in the bedroom and one of the two starts masturbating under the blanket. The other one hears him and decides to help him. They end up jerking each other off and one of the two even kisses the other because "he got caught up in the moment" (I think those where the words he used when the other guy asked him why he did that).
In chapter 10 the girl announces that she supports the two guys' relationship and that she is going to study abroad. One of the two guys is particularly touched because he thinks "she was the first one to support us".

I hope someone of you will recognize it. This is everything I know about it ><


EDIT: thank you so much guys, you are the best! (ɔˆз(ˆ⌣ˆc)
This is the link (unfortunately mangago deletes the replies when a post is edited): http://www.mangago.zone/read-manga/itsuka_koi_ni_naru_made/