http://www.mangago.zone/home/mangalist/815165/
Paradise view
Timeless melody
Life senjou no bokura
http://www.mangago.zone/read-manga/kimi_no_yume_o_mite_iru/
I haven't read the one you said, so I don't know if this is what you are looking for, but I liked it a lot
http://www.mangago.zone/read-manga/haru_no_noroi/
This one had totally slipped my mind, but just got an update and thought of this question
http://www.mangago.zone/read-manga/taste_of_precociousness/
Can someone please recommend me a sad manga? I don’t want a 10 years I love you the most kinda thing I just want a sad manga where it’s depicted that its sad because life is hard