Aw man, I shouldn't've read this thread.
Because now I'm curious too, gdi.

Edit:

@OP: If you're still around, do you remember the art style? It might help narrow it down~.

IS IT AKU NO HANA (FLOWERS OF EVIL)?

Almost 3 years and still no resolution...

Quote from Sadist-Chan

Yeah just like what the title says...
His past from what I remember (or at least I hope I am) was that he was bullied infront of his girlfriend badly and his photos were taken, after that he ranaway from his house and after few years he came back to find her dating another guy because he looked like him, then he kept watching her from afar and when he approached her she didn't recognize him

I hope someone could help me find it...

Bump? 😳

I'm starting to feel bad for bumping this years after years.. 😀
Any ideas? Or maybe a recommendation for something similar?

It has been 6 years, do we have a result yet ? xD

Trying to get ideas for tags:

Blackmail
Bullying
Living in the Past?
Lonely Protag
Look-alike/s
Longing
Lost Love

Seems OP is no longer around to verify which is a shame since I wanted to ask some questions like if this is a one shot or not.