Royal Straight Flush

Flush is the youngest son of the Garness family. His dad owns a Garness Foundation and now he is assigned by his dad to operate a Resort hotel away from home. Flush is only 16 years old and he doesn't want to operate the hotel at first but is tricked by his family to do that. Things are not that easy for him to manage the hotel though, when he meets Juno, whose her family runs the hotel business in the island where Flush is suppose to work there, not to mention unusual rivalry from another family whose want to compete his business with him.

(Source: MangaUpdates)