From Morning to Night, My Husband Won’t Let Me Go ~ A Lewd, Sweet but Imperfect Marriage?!
Contract marriage between the leads but then ML reveals his true self. Job and marriage were agreed on, and it looks like job was to be a tester for some kind of sex cream / aphrodisiac. Only up to 4 stars because we don't get to see what happens after she gets the cream.
The Devil's Guidebook to Love
Contract marriage that FL tries to escape from.
Soredake Kai
Deriheru-hime to Kuro Knight ~ Himitsu no Dorei Keiyaku
FL is left with family debts so becomes a call girl, and ML who has liked her since childhood rescues her and makes her his slave. They're falling for each other. They're bf/gf now, it's cute, not too much drama. I loved this, it was really sweet and I'm glad there was a nice happy ending.
I Gave Birth to the Tyrant's Child
FL gets pregnant after a once night stand but it turns out to be the emporer. She runs away then gets caught a few years later with the 2 kids. There's various escapades as she tries to escape, and other outside drama. Ongoing; ch27.
Special Class with Teacher on the Train
They were childhood friends and now he's her teacher but she doesn't remember him. Smut ensues, also on a train.
What's Wrong with Secretary Kim?
Manga of the tv show
Zantei Kataomoi Dekiai Osananajimi to Wakeari Dousei
FL has loves ML for ages and tells him so, then they end up living together
Arikawa Kyouju wa Dekiai ga Sugiruyou desu