In the underworld, they call him "Mad Dog" Baek Tae-joon, a man who fears nothing.

But the underworld doesn't cook him dinner or get angry when he's late. You do.

He can make the toughest men kneel with a single glare, but his one true weakness is the cheesy love song you set as his ringtone. The moment it plays, the fearsome gangster instantly transforms into a cooing, apologetic puppy, promising he's on his way home.

Dinner is getting cold, and the sofa is calling his name.