hmm.. sort of?
~ http://www.mangago.zone/read-manga/this_witch_of_mine/?kdDC - SO GOOD, I cried so much, strange yet beautiful love stories 1000% read this plz
~ http://www.mangago.zone/read-manga/this_time_i_will_definitely_be_happy/ - Definately, prepare to cry tho
~ days of hana - starts of light hearted but becomes really emotional and dramatic towards the end. read on webtoons for free and to legally support the author pls
~ http://www.mangago.zone/read-manga/tokyo_revengers/?iZJP - he is willing to go back to time again and again just to save her :D
~ http://www.mangago.zone/read-manga/azure_and_claude/ - not sure if this counts but he is willing to die for her so
Dunno if these'll satisfy you but maybe
http://www.mangago.zone/read-manga/koroshi_ai/
http://www.mangago.zone/read-manga/baraou_no_souretsu/
http://www.mangago.zone/read-manga/dreamcide/
http://www.mangago.zone/read-manga/superior/
http://www.mangago.zone/read-manga/basara/
http://www.mangago.zone/read-manga/akatsuki_no_yona/
http://www.mangago.zone/read-manga/sun_ken_rock/
http://www.mangago.zone/read-manga/american_ghost_jack/
http://www.mangago.zone/read-manga/jigokuraku_kaku_yuuji/
http://www.mangago.zone/read-manga/cage_of_eden/
Do you guys know stories where the romance is really strong? As in, they would both kill/get killed for the other,- like "we'll need a coffin handmade for two" type of romamce...