Issei's Dxd Adventure: Into the Backrooms

While Issei and the others were preparing their school festival, The ORC gets a call from Ravel's mother, who informs them to look after their daughter. Issei says yes, after which the calls gets cut off. He then notices Rias walk out, on asking what happened, Rias asked him what she is to him. Issei responded with President is president causing Rias to cry, everyone berates him for this, for not understanding Rias's feelings, instead of Issei taking the insults head on, he snaps at them, for ignoring him, even comparing some of them to Raynare.

He also leaves in fury, after snapping at them, running away from everything, he eventually heads to the same place where Raynare kills him, deeming him too dangerous to be left alive, but something happens, he falls into the ground, which was impossible, he then wakes up only to see that he seemed to be in a yellow walled office room, with fluorescent buzzing lights, and a carpet on what seemed to be moist

Issei is taken to a place where nobody has ever gone to, at least not by their own free will, will Issei survive this unfamiliar world or will he perish and lose his sanity in this new world

High School Dxd belongs to Ishibhumi
Backrooms belongs to backrooms. wikidot and backrooms.fandom

The above two are the main crossovers
Other crossovers Included

Rankings:
#1 in dollface on 20/06/2022
#1 in Level on 22/06/2022
#1 in Naofumi on 16/07/2022
#1 in Ravel on 16/07/2022