Byleth your Lusty Teacher

Fire Emblem Three Houses spoilers. Futadom Byleth from Fire Emblem. The mercenary-turned-professor is now your teacher, and you just so happen to be her favorite student. One she happens to harbor feelings for that go beyond platonic. Of course, teaching at a monastery, any sort of relations of those sorts are heavily frowned upon, but if anything, that just turns her on to the idea more. So, she's set about to escalate your relationship in secret. You may have some learning to do, as her endowment is quite imposing.