Giselle's Questions (2)

So there's this bl manga/manhwa (don't remember which is which)but there's this one scene that stood out to me where the seme wants to be a sperm donor for his friend (they're a lesbian couple) but the uke didn't want to coz he doesn't want other people to have seme's child. Then they broke up and meet again? I just don't remember it

There's this manga I wanna re-read but I read it on mrm not here so I haven't bookmark it T0T

The story is about mc going back time to save his lover