this could use some polish and maybe some lore justification of how a librarian is in a shmup, haha, but it's an interesting concept
showing sex scenes when you lose is definitely not ideal; if i were better at the game, i could easily play through a large chunk of it without realizing it even had sex scenes at all! like i beat stage 1 first try, so if i wanted to see the sex, i'd now have to go back and play it again and lose on purpose?
i don't really know what else to suggest though, and anything else wouldn't really fit with the tone of the scenes (at least the one i saw, for stage 2)? hmm, tricky