Responses
I did have a feeling at the end of the chapter that Masahiro did catch on to Natsuo though that is why he barged in and said "Kousuke-san we are going home" he came to pick his man yeah (￣∇￣")
Yes, Kosuke should know. He'd damn smart, so him being THAT oblivious is rather unrealistic.
I hate when no one notices the snake. I thought maybe Kousuke would have noticed after Natsuo started talking shit but he came back apologizing. Wth.