The episode begins with a recap of the events of the eighth episode of High School DxD BorN and starts with the disappearance of Asia. Shalba Beelzebub appears and kills Diodora for his failure. He also explains that he has cast Asia into the Dimensional Gap where she is presumed dead. Enraged by Asia's demise, Issei's Juggernaut Drive is activated and he fights with Shalba. Issei is unable to transform back after defeating Shalba and is stuck in his Juggernaut form. Meanwhile, Vali's team arrives and brings Asia back from the Dimensional Gap, much to Xenovia's happiness. Irina Shidou appears with a projection device from Odin and it plays the "Oppai Dragon Song". With the help of the "Oppai Dragon Song", Vali's halving abilities and Rias Gremory, they are able to restore Issei. Some time later, Issei and Asia compete in the three-legged race at Kuoh and win. After the race, Asia reveals her true feelings to Issei behind the school gymnasium. (thetvdb.com)