a yaoi where the seme tried to quit smoking and vent his frustration on the uke. and this ...

I'm not sure, but i think something similar to this happens in "choco strawberry vanilla"

Does the seme has long hair?

Umm " choco strawberry vanilla" has two seme's and one of them does have kinda long hair, i mean it's more shaggy than long. Also this yaoi has an emphases on sharing so if you had read it you would probably remember it.

sorry my mistake

yea. i found the manga already. it's this one http://www.mangago.zone/read-manga/ubawareru_koto_marugoto_zenbu/

Hahaha, I was about to give you the link to that lol.
One of my favorites!!! Yoshinaga (๑•ㅂ•)و✧

Hahaha, I wasn't asking you xD That's okay.

https://www.mangago.zone/read-manga/bj_alex/
Side story 3

https://www.mangago.zone/read-manga/bj_alex/uu/iur_chapter-side3/pg-1/

ヾ(☆▽☆)