the author missed the mark on this one. didn't think about the plot enough.

female heroes getting tied up and molested is a major theme in hentai. defloration, mind break, corruption, bdsm, etc. sure it sometimes happens to villainess's, but mostly heroines.
they could have had this same basic story/art, and just made some minor changes to the dialogue. Have the setup being the girls training to resist horny villains and villainesses. so when the horney bastard shows up to break them with his dick, or her latex, whatever, they are all are just, eh, "been there, done that."

Base +6, Litterlight -11, MikeyBroh -29