Pat had started it, honestly. Pran would admit (silently, and to no one but himself) that he had escalated immediately and probably far beyond what Pat had been expecting, but come on. Pat had started slow by teasing him with the word boyfriend and a little playful jab with the seaweed snack. That wasn’t the problem. In fact, hearing Pat call him his boyfriend had made Pran’s treacherous little heart flutter in a way that both tickled and hurt. The problem was that Pran had started this bet already knowing he had lost, and when you enter a fight on the losing side, well… you have nothing left to lose.
Source: Fight to Lose, by Karuke – แค่เพื่อนครับเพื่อน | Bad Buddy: the Series (TV) [Archive of Our Own] | https://archiveofourown.org/
Deliciously filling in the details of the flirting montage in episode 7.