Shoujo with age gap? Like teacher x student relationship or smth like that. If you dont kn...

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

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

I hope this helps, but I would advise against being involved with a teacher when you are their student. Good luck!

14 Sai No Koi has multiple age gap relationships with the side characters. It's josei but feels like a shoujo.

Thank you both

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

yaoi list: http://www.mangago.me/home/mangalist/56720/

http://www.mangago.me/read-manga/akuma_na_eros/ (he doesn't look it buuuut ^^ since he's the devil and all dat'in a high school girl ^^)

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

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

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

http://www.mangago.me/read-manga/keishichou_tokuhanka_007/

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

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

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

http://www.mangago.me/read-manga/sono_me_kuchi_hodo_ni/ (ch.1)

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

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

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

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

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

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

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

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

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

http://www.mangago.me/read-manga/koichirakashite/ (one of the stories in here, she she's people as their mental age ^^)

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

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