Recommendations

Hope this helps
http://www.mangago.zone/read-manga/10_years_where_i_loved_you_the_most/
http://www.mangago.zone/read-manga/equipoise/

http://www.mangago.zone/read-manga/stigma_marloong/

http://www.mangago.zone/read-manga/kosha_ura_no_natsu/
http://www.mangago.zone/read-manga/my_childhood_friend_was_a_god/
http://www.mangago.zone/read-manga/see_you_later_mermaid/
http://www.mangago.zone/read-manga/summer_scent/
http://www.mangago.zone/read-manga/this_ending/
http://www.mangago.zone/read-manga/hope_you_ve_been_well/
http://www.mangago.zone/read-manga/tale_of_the_yellow_dragon/
http://www.mangago.zone/read-manga/a_sea_of_conflicts/
http://www.mangago.zone/read-manga/false_memories_lee_gpiee/
http://www.mangago.zone/read-manga/ganbare_nakamura_kun/ (Not really sad but it made me cry)
http://www.mangago.zone/read-manga/wild_city/ (Sorta sad sorta not)