Hoozuki no Shima
Summary
It’s about two children being sent to live on a basically deserted island. Deserted except for a few other kids and teachers. Suzuhara Kokoro and his blind little sister Yume find that all is not as it seems as they learn more from the other kids and see the actions of their teachers.














In a roundabout way he kind of is the MC's daddy; him seeding a bunch of mutant mandrakes randomly in the forest, one of which she seems to have been reborn into... kinda makes sense in a coincidental kind of way...

Or send her ass to a convent. 