Side-story to DxD Overlord
Momonga ends up in Ero-World of DxD and has to a) not die when facing Raid Boss-level enemies and b) try to succeed in a). Turns out that is somewhat hard for an undead, but what about a skeleton wearing a meat suit?
Ainz Ooal Gown, or rather, Momonga got Isekai'd into Tokoy-3 during the first Angel attack, and got punched in the face by EVA-02. Things... escalated somewhat.