What happens when a deadly assignment goes wrong?Or, has it really?

Just another boy x boy story, but in SHINEE world with four handsome men ..... 
Charismatic flame, Minho
Powerful, Taemin
Almighty and All-knowing, Key
Tofu leader, Jinki

Characters:

Minho: A trained assassin, whose assigned the task to kill people for money.

Taemin: A rich third generation Chaebol, who has inherited all the wealth from his grandfather. 

Key: Taemin's best friend and right hand guy in every operation.

Jinki: Taemin's personal manager.