Manga where a girl dies every time a boy falls in love with her

I’m searching for a manga that I can’t remember the name of (I read it around 2015). The drawing style was clearly not shojo.

• A boy who is the narrator (7-8 years old, white) meets a girl (7-8 years old too, I think she was blonde) and falls in love with her, but, a few days later she dies.
• Then, time passes (1-2 years) and he meets a new girl exactly like her (just the hairstyle changed a little and she had grown too). He falls in love a second time and she dies.
• Then, we see that the time passes (like ten years) and he meets the girl many times, and every time he can’t resist, falls in love, and she dies. This scene was memorable because we see few page where this happened on loop (meet, love, death). Each time the girl is slightly different (one time she is the president of the school, another she is in a club, ect)
• Finally… I don’t know. We arrived at a time where they are 18 years old (or 21, idk). And I can’t remember what happened. I would say that the boy was smaller than the girl.

So, I don’t remember if it’s a one shot or a real manga but it has a greater chance to be a one shot. I don’t think it’s a hentai. But I can’t find it.