it's this one http://www.mangago.zone/read-manga/itsuka_kimi_ni_korosareru/
but the beginnings os on this one though
http://www.mangago.zone/read-manga/itsuka_kimi_ni_korosareru/
Deym. Thats one really tragic one. I didnt even read their own manga since I saw the spoilers and it hurts.
yeah it's fked up
yeah it's still ongoing but am not sure? i mean the characters are different
this side couple's story is kinda same with this one story in the author's other book. it's tragic though.