I FOUND IT! gosh right after i wrote this too. was too soon. but makes sense. the reason i couldn't find it before was becuz it was a short story with other short stories.
it's the second one of this
http://www.mangago.me/read-manga/ichiban_chikaku_de_koi_o_suru/
http://www.mangago.me/read-manga/yume_no_you_na_hanashi/ - Ch.11 Prequel
http://www.mangago.me/read-manga/ichiban_chikaku_de_koi_o_suru/ - Ch.4-5.5 Sequel
There's more but not translated yet.
If you wanna see RAW - http://www.77mh.com/201506/313756.html?page=55
if i could only remember the mangaka but i forgot even that.
the seme is popular at school and have the good looks and everything. the uke is or looks like a delinquent and for some reason asked to be the seme's underling to repay him for something (don't remember what). the seme doesn't want underlings so as a joke and make the uke go away he suggest that they have sex. hoping this would make the uke go away but to his suprise the uke agreed. the seme is blonde and the uke either has red hair or something similar to it
Please help! it's been on my mind for the last week and i still haven't found it. it's driving me crazy!!!