Atsushi and Kunikida of the Armed Detective Agency are forced to handle an unusual crisis when Dazai is found unconscious after eating unknown mushrooms at work. Unable to wake him, they search his phone for an emergency contact and discover a suspiciously named entry: “Wifey<3 ❤️.” Assuming it’s another one of Dazai’s strange jokes, they make the call—only to realize the contact is real, and the person on the other end seems far too familiar with Dazai’s behavior.