Heesu in Class 2 (favorite)
http://www.mangago.me/read-manga/heesu_in_class_2/?av=1
Dream Away (my heart-)
http://www.mangago.me/read-manga/dream_away/
Metamorphosis (cute art istg)
http://www.mangago.me/read-manga/metamorphosis/
Spy x Family
http://www.mangago.me/read-manga/spy_x_family/
Star x Fanboy (bro the ending-)
http://www.mangago.me/read-manga/star_x_fanboy/
The Monster duchess... (Bro i-)
http://www.mangago.me/read-manga/the_monster_duchess_and_contract_princess/
Any recommendations of completed bl manga with heartwrenching story?