(OVA #1 "Ep.13") Oppai, Minorimasu! - A rumor is going about the school about how girls are disappearing and coming back ill and with their breast size decreased.

(OVA #2 "Ep.14") Oppai, Motomemasu! - While observing how the others do their jobs so they can do theirs better, Issei and Asia go with Rias to see if a coffin is cursed. D...