Recommendations?

Shimanami Tasogare it's seinen not really sad but it is awesome try reading it

http://www.mangago.me/read-manga/epitaph_perfume/

Timeless melody / December rain

10 years that I loved you the most.... This shit... Broke me

http://www.mangago.me/home/mangalist/815165/?filter=&page=3

10 years where I loved you the most

Extremely sad,

http://www.mangago.me/read-manga/10_years_where_i_loved_you_the_most/
http://www.mangago.me/read-manga/december_rain/
http://www.mangago.me/read-manga/incidentally_living_together/?YMI0
http://www.mangago.me/read-manga/i_will_be_waiting_for_you_in_1999/
http://www.mangago.me/read-manga/lover_boy_lezhin/?wUp9
http://www.mangago.me/read-manga/like_as_the_time_will_come_when_it_will_rain/
http://www.mangago.me/read-manga/life_senjou_no_bokura/
http://www.mangago.me/read-manga/lonely_to_organdy/
http://www.mangago.me/read-manga/blue_lust/
http://www.mangago.me/read-manga/paradise_view/