High School D×D (2012)

S01E12 I'm Here to Keep My Promise!

Issei awakens to discover the fight has already ended—and he's lost. Rias and her peerage are celebrating her engagement to Riser at a party, but Issei refuses to accept defeat. With assistance from Grayfia and Asia, he resolves to crash the celebration, snatch Rias away from the engagement, and take her back home where she belongs.