i can`t say anything about popularity, but i`d recommend these:
http://www.mangago.me/read-manga/saa_koi_ni_ochitamae/
http://www.mangago.me/read-manga/the_hinanomori/
http://www.mangago.me/read-manga/toshishita_no_ryuugi/
http://www.mangago.me/read-manga/yatteraneeze/
http://www.mangago.me/read-manga/brother_x_brother/
the warui series from Sakuraga Mei:
http://www.mangago.me/home/mangalist/6968/
the series from Fujisaki Kou:
http://www.mangago.me/home/mangalist/7543/
http://www.mangago.me/read-manga/jazz/
http://www.mangago.me/read-manga/kiss_me_princess/
http://www.mangago.me/read-manga/yume_musubi_koi_musubi/
Dear Green series:
http://www.mangago.me/read-manga/dear_green/
http://www.mangago.me/read-manga/dear_green_hitomi_no_ounowa/
kinda popular but still good:
http://www.mangago.me/read-manga/love_stage/
http://www.mangago.me/read-manga/okane_ga_nai/
http://www.mangago.me/read-manga/katekyo/
http://www.mangago.me/read-manga/crimson_spell/
series about Saki x Jun:
http://www.mangago.me/read-manga/kokoro_kanda_neko/
http://www.mangago.me/read-manga/koigokoro_kanda_neko/
http://www.mangago.me/read-manga/tokimekigokoro/
Thank you! You really made my day (night)
Thank you! You made my day (night)
A pretty cool read is Hakkenden The Eight Dogs of War, or [switch]/switch Dragonfruit. I also like Adekan. (each of these is multi-chaptered and have interesting plots.
Hi, I'm having a rough time right now and I would like some manga's that cheer you up. I'd like a long series and it would be awesome if it isn't a very popular one. It doesn't have to be completed. Thanks :)