Cheater Cheater, Hearts on Fire

Tawan and Gun are married to two different people, but they're both unhappy in their own marriages lately.

Gun's been married for two years, but deep down, he's starting to feel bored in his marriage. Attempts to inject spark into the marriage doesn't generate promising results. Meanwhile, Tawan is unhappy in his own marriage, often finding himself comparing his absent beta husband to his younger brother's omega, Gun, instead.

It was meant to be just drinks. Two unhappy individuals with their respective married lives needing a listening ear, but drinks lead to a one-night stand with both realizing that maybe (definitely), they're meant for each other instead.