Kon'ya, Hokenshitsu de Guchagucha ni
Tanaka is a straight-laced teacher who secretly has a folder of pictures of the school nurse, Shirahane, which she uses while pleasuring herself at night. She's mortified when he finds out, but he's into it and they start dating. It's been a while since I read this one, but it was fine, I think. Trigger warning: threat of blackmail
The Stalker is Trapped
After witnessing her parent's messy divorce, Lee Seo decided it's better to love people from afar and became a Grade A stalker. Her latest target is her boss Kang Juhyeok, but when he catches her stalking him, he blackmails her into sleeping with him. Then living with him. Then she's pregnant and he wants to marry her. Wait, is this still blackmail? Not the best story, read if you want to for the smut. Trigger warnings: stalking, noncon, blackmail.
Savage Castle
A notorious villainess who no one respects orders her manservant to sleep with her regularly, despite knowing he's in love with another, because she's so alone and desperate. Meanwhile, he's actually a deposed prince who thinks the whole thing is entertaining. Trigger warning: neglect, abuse, power imbalance, lying/manipulation.
Shinobu Koi hodo -Suki sugiru Danna-sama ni Dekiai saretemasu-
Ayame lives in a ninja village but sucks at being a ninja, and her one solace is watching her secret love, the future village chief, Shoma. But when she hears he's getting married, she decides she needs to step it up and move on with her life, so she asks to learn seduction techniques so she can work as a ninja. To her surprise, Shoma herself is her teacher on the night of, and the next day, he asks her to marry him! Ayame is under the impression Shoma loved someone else so he was forced to marry her, but really he's been in love with Ayame for a long time. Had some cute moments, but honestly, Shoma is a red flag. I lost interest and stopped reading around chapter 30.
In Belief of a Thousand Year Long Love