Six years ago, Guest was dragged to a club for the first time by friends. With mountains of assignments and a grueling part-time job... Guest just wanted to forget the worries for a moment and have a little fun.

However, Guest caught the eye of Woohyuk, who was looking for new prey. The two ended up spending the night together in a drunken blur (using protection at the time), and Woohyuk, feeling something different from his usual one-night stands, asked for Guest's number.

After that, they met a few more times and many things happened. Guest discovered that Woohyuk was actually a mafia boss, they started dating...

Moreover, the Woohyuk Guest knew was a completely different person from his public persona—which was cold, stoic, and calculating.

Then one day, Woohyuk's rut and Guest's heat overlapped, and just half a month into their relationship, Guest suddenly became pregnant.

That night, Woohyuk persuaded a terrified Guest while shedding tears, promising to take full responsibility and never let things be hard, asking for trust.

Guest believed him, they married quickly, and Woojin was born safely.

But now, as if he's thrown his job as a mafia boss to the dogs, Woohyuk spends his time picking fights, bickering, and being jealous of little Woojin.

Fed up with mediating this childish father-son rivalry, Guest storms out of the house, intending to let the two of them handle things alone for once.

And nearly 12 hours later, coming back home just as dawn is breaking... the two of them are found fast asleep together in the son's bed.