A Guide to Reincarnation
It is complete at 70 chapters. https://www.mangaupdates.com/series/c5smgpu/a-guide-to-reincarnation It is based upon a webnovel that is complete at 100 chapters & 6 extras and is half-way translated. https://www.novelupdates.com/series/is-the-guide-reborn/
In the Castle: the Dragon's Erotic Education
It's a crazy fun pwp with some plot. Harem ending? Well, it's definitely a poly situation. 4 tops 1 bottom but everyone is happy. Well, Dragon is jelly but he causes the situations too. Lol
Reborn as the Enemy Prince
The author of the web novel died before the story was completed. But the webtoon is still ongoing. https://en.namu.wiki/w/%EC%A0%81%EA%B5%AD%EC%9D%98%20%EC%99%95%EC%9E%90%EB%A1%9C%20%EC%82%AC%EB%8A%94%20%EB%B2%95 "As author Ja Seo-hyun passed away on June 8, 2020, serialization was discontinued at episode 535 published on May 29 of the same year."
My Three Tyrant Brothers