I am looking for a manga that i read a long time ago. I only know some details of it so hopefully it helps.
i feel like the best example for it is School Days but has more hentai scenes. I think it starts with the main character being in school with his childhood (could be wrong on that put) friend. The main character loves her but then he fells in love with another student from his school, I think she had long black hair but I could be wrong. The girls do become friend but they also compete for the main character love. The main character has sex with the two but also has sex with all the other girls from the school, I think one of them was the club president that he joins. While he does have sex with all the other girls, the story just focuses on the two girls, the childhood friend and long black hair girl
I do remember how it kinds of end.

The childhood friend forces herself onto the main character to have a baby so that she has something of him to always be with and the main character is killed by being pushed into a train.

Sorry if it is not a lot of detail to go on.

Thank you very much.

Try Uwakoi[m] and Iinazuke Kyoutei. Sorry if they aren't right those are all I could
find

Thank you very much
Uwakoi was the one i was looking for.