Title: Penthouse XXX
Siyeon is leading a double life. Due to his ex, who stole every dime Siyeon had before disappearing, Siyeon is in debt and forced to moonlight as an assassin to make ends meet. He doesn't really know who his employer is. All he knows is that once or twice a month, he receives a package with a pill and information on his next target. So why would they choose a pretty boy like Siyeon to be an assassin? As it turns out, Siyeon is an esper who can manifest ice and change the temperature at will. The pill they send helps amplify his powers for a limited time, and with his abilities, he often causes his targets to have heart attacks by freezing their hearts, leaving no trace of any foul play. Otherwise, he's just a regular guy with freezing hands.
With his debt steadily falling by the day, Siyeon can finally better his living arrangements and goes to see a room that is being rented out in a massive penthouse by the owner of the building, who also lives in the penthouse. The man who answers the door is party animal heir Taekyung. Though Siyeon has sworn off men due to his terrible dating history, Taekyung doesn't make bad eye candy. Unfortunately, after a night of drinking, Siyeon's self-control wanes, and they get hot and heavy in the bedroom. While Siyeon regrets it immediately, Taekyung is all the more intrigued. He wants Siyeon, and he's going to do everything he can to claim him.