http://www.mangago.me/read-manga/kokoro_kanda_neko/
It is a series
http://www.mangago.me/read-manga/my_little_vampire/ (Super sweet and cute!)
http://www.mangago.me/read-manga/toshishita_kareshi_ni_hirowaremashita/
http://www.mangago.me/read-manga/gun_and_heaven/ (Badass)
http://www.mangago.me/read-manga/papa_s_assasin_ryuunosuke_wa_tonde (one of my personal favorites)
http://www.mangago.me/read-manga/hige_wo_soru_soshite_joshikosei_wo_hirou/ (shoujo version)
http://www.mangago.me/read-manga/hana_to_akuma/ (shoujo)
http://www.mangago.me/read-manga/love_so_life/ (shoujo)
http://www.mangago.me/read-manga/how_sweet_is_a_sugar_daddy/?av=1
http://www.mangago.me/read-manga/suki_ni_nattara_dame_desu_ka/ (highly recommend)
http://www.mangago.me/read-manga/fushidara_na_hanatsumi_otoko/ (very smutty)
http://www.mangago.me/read-manga/blue_blue_blue/
http://www.mangago.me/read-manga/irony_dress_ni_sayonara/
http://www.mangago.me/read-manga/chotto_matte_yo_hanaya_san/
http://www.mangago.me/read-manga/sayonara_alpha/
http://www.mangago.me/read-manga/goodbye_lilac/
http://www.mangago.me/read-manga/koi_ga_ochitara/
http://www.mangago.me/read-manga/namaiki_kareshi/
http://www.mangago.me/read-manga/itou_san_kuraka_sui/
http://www.mangago.me/read-manga/shoushin_otoko_ni_haru_no_arashi/
http://www.mangago.me/read-manga/yume_musubi_koi_musubi/
http://www.mangago.me/read-manga/zattou_ni_asobu_sakana/
Looking to read a good romance with a age-gap, preferably over 10 years++ for the gap. It can be of any genre: Shôjo, yaoi, yuri...
I already watched / read: Super Lovers, Junjo Romantica and Koi wa Ameagari no You ni.