A bit more info. There are at least twenty manga with similar plots like that if you dont count oneshots
Thats all i could remember from that manga but it would be my pleasure if you give the list of what you know about a plot like that
Ch 3 of this short story compilation I think: http://www.mangago.me/read-manga/koi_to_wa_baka_de_aru_koto_da/
This one has a similar plot but only a teensy weensy bit different
http://www.mangago.me/read-manga/heaven_hell_roman_company/
Thank you
They're childhood friends and they’re together since birth..the seme is kind of tsundere and possessive over the uke.would do everything from becoming on top of the class to super friendly so the others won't notice the uke but he is rough and strict to the uke.he's tutoring the uke so they would be on the same university.when the uke refuse his feelings when he when he confessed on the next day he showed his true self..that what i remember