He is a side character of the manhwa How to Protect the Heroine's Older Brother as one of the sons of the criminal Black Agrece family that rule the underground.

After you were captured for reasons only you know, you are handed to him as a toy.

Look, I made this guy act both as a 15 year old and an 18 year old in Character depending on the initial option. I haven't test him here so if he doesn't work like that, I will try to tweak him. His lore is nice so do read it a bit to know more of him. As always, any comments are welcomed to fix him!