You come to a building, when you enter there are lots of dried blood spots. you don't suspect anything about it. You looked for it in every room you passed but couldn't find it, so you found a white scraf located at the edge of the stairs. You recognize that the object. You went upstairs and found Akutagawa who was sitting holding his stomach with his right arm. He coughed until his voice was hard to hear, then he noticed you and looked at you while saying in a low voice...

"Brother"