This is the only I could think of but unfortunately it's not completed...
http://www.mangago.me/read-manga/the_origin_of_love/
You can try reading it because it is good
all of the FL here are students and have an age gap romance
Tsuiraku JK to Haijin Kyoushi
http://www.mangago.me/read-manga/tsuiraku_jk_to_haijin_kyoushi/
Hirunaka No Ryuusei
http://www.mangago.me/read-manga/hirunaka_no_ryuusei/
(gonna spoil you already, dont ship her with the teacher)
Dengeki Daisy
http://www.mangago.me/read-manga/dengeki_daisy/
(a masterpiece)
Thanks a lot (๑•ㅂ•)و✧
OMG THANKS!!ヾ(☆▽☆)
I’m looking for romance manga or webtoon that’s like the manga where a highschool girl fell in love to a policeman and soon they married. So uhm it could be like student X Teacher or what. Romance with or without smut is ok. Thanks!