Recommendation

how sweet is a sugar daddy

http://www.mangago.me/read-manga/lover_boy_lezhin/?a9BD

Hitorijime my hero
Junjou terreorist (junjou romantica)

ahhh that one. one of my firsts

Then maybe this?
http://www.mangago.me/read-manga/i_m_no_match_for_him/

Age gap
http://www.mangago.me/read-manga/kirei_ni_shiteyo/
http://www.mangago.me/read-manga/jounetsu_kakumei/
http://www.mangago.me/read-manga/hatsukoi_no_tonari/
http://www.mangago.me/read-manga/yamada_to_shounen/
http://www.mangago.me/read-manga/oita_ga_sugiru_wa_koneko_chan/
http://www.mangago.me/read-manga/almost_paradise/
http://www.mangago.me/read-manga/suki_ni_nattara_dame_desu_ka/
http://www.mangago.me/read-manga/how_sweet_is_a_sugar_daddy/?av=1
http://www.mangago.me/read-manga/koi_ga_ochitara/
http://www.mangago.me/read-manga/on_or_off/
http://www.mangago.me/read-manga/lover_boy_lezhin/?av=3
http://www.mangago.me/read-manga/kyou_mo_ashita_mo_asatte_mo/
http://www.mangago.me/read-manga/2ban_me_no_alpha/
http://www.mangago.me/read-manga/oniisan_to_yobinasai/
http://www.mangago.me/read-manga/because_of_you/?av=1
http://www.mangago.me/read-manga/zattou_ni_asobu_sakana/

For more Age gap you can check out my list
http://www.mangago.me/home/mangalist/607063/