Drama where a criminal has double lives

I wanna watch something where someone like a murderer, thief or just someone who is going against the law handles two lives. Like one where they're a student/working any job/ or anything like that and the other is the criminal life they need to hide. Thank you! 

 Shi :

Tell Me What You Saw is a Kdrama (The person might've been suggesting you to watch it :D)

OHgKKH

 ahsaaful:

1. Hello Monster 
2. The Three Musketeers It's in the good side
3. The Vigilantes in Masks  It's in the good side

thank you :)