This is my very first time writing in a forum looking for a manga but this manga has had me curious for a couple of years now so I really need to know if anyone here knows the tittle. I've read it before but i forgot what's it called.
So the manga starts with a girl in her class room and and saw a guy trying to jump, suicide or something I forgot but he was on the rooftop of the school. I think the girl talked to the guy on the rooftop after that and they became close and started dating. Apparently, the guy had like a tragic past in his middle school involving his already dead twin and a girl they both loved in the past. To make it short the guy thought that his twin killed himself from a broken heart because the girl from the middle school chose him over his twin.
I also remember that his twin liked to paint and one day the girl and the guy when trying to like find the mystery behind his death they found like a suicide letter in the canvas of a painting. And the girl from the middle school tried to get the guy back but he chose the girl from the high school.
That's all I can remember, if you guys know what this manga is please let me know cause IM DYING TO KNOW :''''''(

Mars?

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~4400 manga completed
~1700 ongoing...

I actually don't think that's Mars as the starting and the meeting between the main characters is completely different from how miatopolis described.

I think it's more likely he/she remembered wrong than all the other similarities belonging to another manga...