Kinda fits your description...
http://www.mangago.zone/read-manga/lifeless_man/
Roureville
http://www.mangago.zone/read-manga/cosmic_boy/ is really good
i cant really remember if any of these have explicit scenes, im pretty sure they dont have any tho!
http://www.mangago.zone/read-manga/goshujinsama_toke_dama/
http://www.mangago.zone/read-manga/11_59/
http://www.mangago.zone/read-manga/this_ending/
Can someone recommend me some angsty and sad non-explicit bls for me with happy endings? Thanks :)