Dramas where a character looks evil but really is sweet

So I'd like to watch something (literally anything: drama, movie, anime)  with a character who seems to be evil, scary, cold or something like that but turns out to be sweet and caring. It can be FL or ML but not a side character.
I don't mind dramas with little or even no romance or bls or any other genre as long as it suits my request. As for countries, I prefer Korean and Japanese dramas but for ones from other countries I have one more request: it souldn't have too many episodes.
Thank you in advance!

 PrincessJirachi:

Gokushufudo (Jdrama) - male lead is a former Yakuza who is now a devoted house husband but people are intimidated by his appearance. 

Thank you! I loved the manga so hope i'll like the drama just as much.

Come and Hug Me  (source)

 Sara Kavari:

Mad dog (loved this the ML has what you are looking for)

Hello monster

Tale of the Nine-Tailed (Kim Bum's character)

A love to kill

 

Thank you! I'll check them out.

 AH :

Come and Hug Me  (source)

Oh thanks! Been planning to watch this for a long time but didn't know the drama hasa character of this type.

 Perua4:

Lawless lawyer.  I have just finished it. It’s more an action (main leads are a couple of lawyers) with some romance.

Thanks! The cast looks great already :D