Need help searching for a bl manga

I only remember the story vaguely, but I will try my best to explain the plot.
The story revolves around three guys: Guy A (seme turned uke) likes Guy B, who has a girlfriend but he also sleeps with Guy C(seme). The girlfriend is ok with Guy B sleeping with other guys. One day Guy A discovers that his friends have been sleeping together and he also starts to take part. Later on, Guy B wants Guy A and Guy C to have sex, they do it and we learn that Guy C actually liked Guy A (I think this happens in the first chapter). The story ends with Guy A and Guy C getting together.

I would deeply appreciate it if someone could help me find this