Subaru saw the smoke and tried to fight it but then was passing out and heard a voice and was kicked bad and was knocked out. When he came to he saw Yukina was gone and looked for her and remember Shuu. Subaru ran to their classroom and saw his brother on the floor and tried to wake him up.

Azusa waited for his brother to bring Yukina to his room and kept a eye on Yuna who was knocked out and saw the mark and knew Shuu drank her blood and it was true about them.