Responses
Have you watched banana fish or grave of the fireflies?
idk if anybody else knows this but this is an adaptation from a Chinese bl novel, BUT I'm not going to read it because it is a plagiarised novel :((
I really love the author,
http://www.mangago.zone/read-manga/koko_wa_ima_kara_rinri_desu/
For me its 10 years where I loved you the most I can't get over it, chapter 71 was the most painful and beautiful I ever read
http://www.mangago.zone/read-manga/10_years_where_i_loved_you_the_most/