Deep Flower
model and fan go to high school together where they become sex friends. U leaves after graduation because S only sees him as a plaything and is violent. They reencounter 5 yrs later when U has a new lover.
Love Is An Illusion
an omega thinks he's an alpha and a rich alpha who hates omegas falls for him. O ends up staying at A's house after job scams and O ends up pregnant.
Nikushoku no Buka
subordinate who uses his body for sales and his boss fall for each other. S rejects U at first but immediately regrets it and video calls him and gets jelous over U's marriage matchmaking meetings. They end up living together and shopping for fun etc
Misekake Oresama-kun
A popular guy falls for an outsider who sticks up for him and so he stalks him following him to college and invites him to a drinking party. They end up as sex friends
Kimijima Kyoudai no Honkai
Younger brother is in love with older brother but older brother is constantly sleeping around so younger sleeps with his partners so they'll leave him. They and up being sex friends but both are insecure and kinda sleeping around with others.
Kiss Mo Dekinakatta
After being rejected by his crush (from the prequel manga) U offers to be a replacement of S's crush as he has loved him secretly for years. S falls for U but U is insecure about S feelings even though he really likes him back.
Jawbreaker