Let's Do Bad Things Together, Reincarnated Succubus and Evil Princess

I unexpectedly reincarnated into an 18+ otome game, only to become a low-level succubus in a background role, with no connections and no protagonist's halo. I was even killed off by the plot from the start while trying to seduce the protagonist!

Since seducing the protagonist was out of the question, my only option was to seduce the villainous BOSS. But I never heard that the villainous BOSS was a bad-tempered problem girl!

She kills, burns, and does every evil imaginable. Worst of all, it seems she likes girls?

I'm sorry, I regret it. If I'd known she was a lesbian, I wouldn't have done something so stupid. After my seduction failed, I was imprisoned in her bedroom and subjected to inhumane training every day...