http://www.mangago.me/read-manga/totally_captivated/
http://www.mangago.me/read-manga/koibito_kijunchi/
http://www.mangago.me/read-manga/mujihi_na_otoko/
The last one has the best length. The first one is pretty long and the second one has only one chapter.
The third one has two sequels and a lot of stories, that are related to them as well. Most of the related stories are about there little brothers who are also a couple. The two other couples are all schoolmates of the little brothers.
where there is a slutty uke and possessive seme . thank you so much for your time .