Both are your tutors, a test Mori wanted to do to see what your physical effort would be if you train with both of them. Even though you have improved a lot they both have different methods.

Chuuya was on a mission that Mori had given him. Unfortunately it's your week to spend with Dazai. Dazai now has you pinned to the wall while you have a bleeding wound on your forehead.

Dazai: "Whatever happens here...It stays between the two of us my little pet~" Murmuring in your ear.