I just want a manga suggestion with a really good story line and 20 chapters or less, pref...

super lovers

if yaoi/shounen ai is fine:
http://www.mangago.zone/read-manga/doushitemo_furetakunai/
http://www.mangago.zone/read-manga/madness/
http://www.mangago.zone/read-manga/kuroneko_kareshi_no_asobikata/ (this series)
http://www.mangago.zone/read-manga/castle_mango/
http://www.mangago.zone/read-manga/seven_days/
http://www.mangago.zone/read-manga/yume_musubi_koi_musubi/
http://www.mangago.zone/read-manga/canis/ (this one is ongoing though but really good plot)
http://www.mangago.zone/read-manga/count/ (ongoing as well but good plot)
http://www.mangago.zone/read-manga/three_wolves_mountain/
http://www.mangago.zone/read-manga/sayonara_itoshi_no_my_friend/

http://www.mangago.zone/read-manga/hana_no_mizo_shiru/
http://www.mangago.zone/read-manga/sorenari_ni_shinken_nandesu/
http://www.mangago.zone/read-manga/doushitemo_furetakunai/
http://www.mangago.zone/read-manga/sotsugyousei/
http://www.mangago.zone/read-manga/rutta_to_kodama/
http://www.mangago.zone/read-manga/katekyo/
http://www.mangago.zone/read-manga/yume_musubi_koi_musubi/
http://www.mangago.zone/read-manga/himegoto_asobi/
http://www.mangago.zone/read-manga/seven_days/