Based off a 'reverse isekai' angle in part.

Basically:

WANTED: Minions for the Great Dark Prince:
Basically we follow characters that 'accidently' or just by pure random chance are picked to support/work in the somewhat cliched army of the 'Great Dark Prince' (and possibly later 'The Rebellion', but I think it's easier to justify the crunchy corruption angle if you use some comedically villainous perspectives).

So, bored college girl signs up for weird online game or answers weird 'wanted ad' and next thing she knows she's summoned to be some kind of fantasy minion unit. Such as a bondage dressing were-bird sorceress with the fashion sense and 'plumage' of Naga the White Serpent from Slayers. Some action/'action' on one side of the summoning till she's defeated, sent back to her normal life...

Only for the new personality/nature to start to bleed through. Made all the worse when they call her up for the next battle.

So one can have weird fantasy shenanigans, mechanically based humor, and transformation/corruption plot all going on at the same time. With whatever 'sexy' theme of fantasy archetypes make the most sense.

(And yes, I mostly use the furry ref as I'm still on about Ramona... and I think one could make a very funny joke about scantily dressed Were-Owl-Wizardess laughing all "Who-oho-oho" in classic tropy anime form.)