Based on what they did in previous chapters, I think Yu has a control kink more than the other three. Yu mentioned not enjoying the maid dress as much which definitely feels more shame related given his personality. And the time at hotel, which was the reason he thought he might be an M, was a situation in which he seemed explicitly interested in having a lack of control over the situation. My knowledge on the topic is not great so I’m just going based on general observations if anyone with more knowledge wants to clarify.
Based on what they did in previous chapters, I think Yu has a control kink more than the other three. Yu mentioned not enjoying the maid dress as much which definitely feels more shame related given his personality. And the time at hotel, which was the reason he thought he might be an M, was a situation in which he seemed explicitly interested in having a lack of control over the situation. My knowledge on the topic is not great so I’m just going based on general observations if anyone with more knowledge wants to clarify.