It's not the little brother. I was paying attention to the clothing of the characters and the ones on the floor. It's the redhead/bluejacket guy
Oh my Chuck!! Re-reading it, I saw that now!! Nice catch on that one. My hypothesis is that the little brother did hypnosis on the sunbae to ask the redhead to do it with him.
With a possibility that he did it to the redhead as well, maybe not.
Yeah. That's exactly what happened. Notice that MC mentions the blue jacket guy would rarely show up to the group but suddenly decided to show up today...
**FYI there’s gonna be like a spoilers if you haven’t read chapter 46…(￣∇￣")
From what I saw on the previous chapter, I knew the brother was going to make something like this happen. And let me just say that is going to happen either this two ways on the next chapter:
1. The first one could be the little brother “sleeping” with the sunbae in theory, just to say to the older one “ If is not me. I’ll fuck up any of your relationships!”
2. The other one could be the character we just saw, I’m gonna call him redhead, Because why randomly he got that spotlight on this chapter?
Either way Those are my predictions for say, But I don’t know, I could be wrong, the author can give us another plot twist.