im so so confused but im not hating it- someone try to explain whats happening

I can try explain it (I literally don’t know the names sooo this is gonna be bad)
But basically the black haired girl (or really dark blue hair Idek ) likes the coach but the girl with the pink glasses likes the coach too and the coach likes her back. So the girl with the pink glasses is trying to hook “her friend” (girl with black hair) up with some other dude so that she won’t be heartbroken...But the s/x scenes in the early chapters literally have no plot or is relevant to this soo...I tried my best

ohhh- thank u for explaining :))