Kuchibiru to, Sailor Fuku.

Kaku Shite ichiya no saporīman (斯くして一夜のサポリーマン)
Hai Kyuu Ai (ハイ・キュー・アイ); COMIC Koh Vol.6.
School Asscort / Kounai Enkou (口内援肛)
A janitor at a high school has made arrangements to relieve his stress. With the arrangement engaged, he may relieve himself at a certain price with a young girl from a different high school.
Oazuke Lip (おあずけリップ)
Houkago Drops (放課後ドロップス)
Namaiki Lip (ナマイキリップ)
As a young, oral sex-enthused tutor makes his way to student Aki Kimishima's house, he thinks about how she's probably slacking off and reading manga again. Unsurprisingly, he hits the nail right on the head. This time however, their usually quiet lesson is flipped upside down when Aki asks him about his interest in oral sex.
Namaiki Lip puppu (ナマイキリップップ)

Namespace	Tags
artist	bubuzuke
male	condom, dilf, tracksuit, tutor
female	anal, beauty mark, blowjob, glasses, gyaru, hairy, pantyhose, ponytail, prostitution, schoolgirl uniform, sex toys, smell, stockings, sweating, tall girl, tracksuit, twintails, vaginal sticker
other	mosaic censorship, tankoubon
Source

After School Drops