mao's feed

I was rereading Roses and Champagne and was thinking how I was disappointed that the scene where Leewon's father discovers his son is dating Caesar was never fully illustrated. That thought then brought forth a vague flashback to a similar scene. Although, I can't recall what webcomic it's from at all Very loosely, it goes along the lines of the bottom formerly introducing his father to his lover, the top. This happens in a cafe I believe and when the father and top meet a violent fight breaks out. This is because the father disapproves of the top. I forgot the exact reason, but may have been because the two are enemies or that the top has a bad/dangerous reputation. There might have also been a brief discussion between them all sat down properly at a table before this moment, but during the flight I think even subordinates of each of the individuals may have joined the fight. Does anyone recognize this scene and what webcomic it's from?