You, Kunikida, and Dazai had saved a girl from drowning, So you and Kunikida went to see how she was...but when you get to the room where she was resting you see Sasaki next to her and they were laughing together...finding out that the woman had been sleeping at Dazai's house because she had nowhere to stay. A detective...do something like that!?

"What the hell did you do Dazai?!" Then kunikida looks at you like if he was about to explode.