Mangas with Novels

https://www.novelupdates.com/series/my-childhood-friend-the-demon-knight-hates-me/

https://www.novelupdates.com/series/the-villain-daughter-enjoys-her-seventh-life-as-a-free-spirited-bride-hostage-in-a-former-enemy-country/

https://www.novelupdates.com/series/please-dont-eat-me-saha/

Novel was stopped being translated because some sort of witch hunt against translation of the novel, here is the spoiler forum:
https://forum.novelupdates.com/threads/seduce-the-villains-father.102309/

https://www.novelupdates.com/series/suddenly-became-a-princess-one-day/

https://novelcake.com/series/wedd

This is a fantastic story
https://www.novelupdates.com/series/i-want-to-become-the-heros-bride/

https://noveltrench.com/manga/men-of-the-harem/

https://wuxiaworld.site/novel/the-law-of-webnovels-webnovels-webnovel/

https://woopread.com/series/the-villainess-is-a-marionette/