I read it on 2020, it was a bland romance story with a plot twist in the end, like most romance high school story, there is a boy and girl, i remember the girl was in a swimming pool club, and the boy... idk probably just a normal guy, so im going to skip to the climax, so as far as i remember there is an accident happened, but hopefully the two of them didn't die, and i forgot to put this earlier but they did have relationship and they kissed, so in the end after the accident (or was it before...?), they found out they were blood related and then, the manga ended when they finally accepted that they were blood related and just come back as they always be.... (Like as if what to the both of them before, didn't happened)

So that's it i hope someone whoever read this, gets it haha, sorry I can't give more specific information since i can't really remember it.

evergreen?