The second semester starts, as Irina now enrolls herself to the Kuoh Academy being in the same class as Issei. She then reintroduces herself to the Occult Research Club members as a member of the Brave Saints and Michael's Ace. After school, Irina notices a depressed Rossweisse at Issei's house after being left behind by Odin. Meanwhile Issei and Asia is sent shopping to help prepare for a welcoming party for Irina. On their way back, Asia almost trips and is supported by Diodora who reveals that he is the Devil Asia rescued in the past and proceed to propose to Asia. Night time in the Hyoudou Residence, Issei and Asia reports their encounter to Rias until Gasper arrives and tells them that the preparation for the welcoming party is complete. During the party, Azazel joins in and shows everyone in the party about Issei's uprising popularity with the kids earning himself the nicknames: Breast Dragon Emperor and Oppai Dragon, much to his chagrin and Ddraig's dismay. The next day, Issei's class prepares for the sports days and was tricked by Kiryuu into joining a three-legged race with Asia. In the noon, Issei joins his classmate on their preparation for the sports days as Issei starts practicing with Asia. Issei later has a dream on Asia marrying Diodora while his parents and friend send her off happily as Issei wakes up due to denial. Rias then shows the many invitations send by Diodora for Asia, claiming that she'll dispose the invitation while Issei and Asia heads to train for the sports day.While practicing, Xenovia convinced Asia to let Issei to fondle their breast but ws stopped by Irina who tells them todo it in bed. At the club room, Rias reveals the Rating Game tournament between the Young Devils and their first opponent for the tournament, Diodora Astaroth.