Noticing Irina's birthday was a few days ago, the students arrange for Karasuma to give her a bouquet for the occasion. However, the mood is spoilt when Karasuma casts aside Irina's romantic interest for the good of the mission, leading her to storm off. A few days after Irina stops showing up at school, the students are suddenly snuck up upon by a flower shop attendant, who reveals himself to be the infamous Reaper and tasks the students with rescuing Irina, who he has kidnapped. When the students are lured into the Reaper's trap, they attempt to escape and find Irina, only to be taken down by the Reaper one by one, with even Nagisa's special move being turned against him. Meanwhile, the remaining students manage to find Irina, only to discover she has turned against them and is siding with the Reaper. As all of the students are recaptured, Koro-sensei and Karasuma begin their rescue attempt.