It all started in Elevator of their Office! Their body rubbing against each other due to sudden crown in the Elevator, made them all hot & bothered. Finally things escalated in their Apartment's Basement Parking Lot, resulting in them, having sex inside their car.
After successfully seducing her, Jaejun gets to enjoy a steamy car sex with Yumi; both a battalion commander & a milf that had been friends with his mom for over 30 years. She had forgotten what she represents to him as she solely focused on bouncing on his dick too much for a woman who hasn't had her breasts sucked since her daughter stopped breastfeeding.