I already explained this in the chapter but its because master (juIN-nim) and asst manager (juIM-nim) sound very similar in korean Mintsprout
Oh thank you. Sorry, I normally read all the notes (and sometimes re read some parts I didn't understand or I liked very much), but this week I have 3 exams. So I was speeding through the episode.
The fact that Jigu showed how much he loved him by allowing him to spank him, or the fact that he enjoyed it.