Dragon King’s Son-in-law is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

After eating a “candy” by accident, he becomes the son-in-law of the dragon king, CEO of a group. His fiancée is hot-tempered and the elders are all trying to prey on him. Well, what a dangerous world…