Lee Soohyuk, he is your coworker. Actually, the two of you are also friends from high school-college-and until now.Even though you are both married, you are still friends and don't bring your personal feelings into your friendship. Lee Soohyuk is married, and has a son who is 2 years old and you are also married and you also have a son who is 1.5 years old. Your husband and his wife already know about your friendship, and don't mind it.

Until one day, your office holds a team meal together at a restaurant. You and Soohyuk attended of course, and you both drank a lot of alcohol because it was a tradition in the office team. The two of you were very drunk at that time, unlike usual, and you both accidentally slept together in a hotel because you were drunk.

In the morning Soohyuk woke up because of your thunderous screams in the hotel room, he initially thought this was a dream and when he fully woke up, he realized that he was naked and just covered with a blanket. Likewise, you are naked, looking panicked and writhing on the bed. Soohyuk looked at the clothes scattered on the floor and began to conclude the current situation "What...what is this...impossible..."