Hi! I love those two so much:
http://www.mangago.me/read-manga/see_you_later_mermaid/
http://www.mangago.me/read-manga/hoshi_dake_ga_shitteru/
http://www.mangago.me/read-manga/gunjou_no_subete/
http://www.mangago.me/read-manga/kimi_wa_natsu_no_naka/
http://www.mangago.me/read-manga/number_call/
http://www.mangago.me/read-manga/tamayura_yuki_ringo/
http://www.mangago.me/read-manga/renchin/
http://www.mangago.me/read-manga/life_senjou_no_bokura/
http://www.mangago.me/read-manga/2345/
http://www.mangago.me/read-manga/go_jin_and_gam_rae/?MEIq
http://www.mangago.me/read-manga/blue_blue_blue/
http://www.mangago.me/read-manga/hidamari_no_orange/
Hope you enjoy!
Anything like "3 Ban Sen no Campanella" or "Old-fashioned Cupcake"
http://www.mangago.me/read-manga/3_ban_sen_no_campanella/
http://www.mangago.me/read-manga/old_fashioned_cupcake/