Tantei Gakuen Q
Summary
From Storm in Heaven: Kyu's greatest desire is to become a detective. To fulfill his wish, he goes to take the entrance exam to get into the detective school run by Dan Morihiko, one of the most famous detectives ever! At the exam he meets Megu, Kinta, Kazuma, and Ryu as they all try to pass the grueling three-part exam. Kyu wants to solve mysteries, and he gets his wish: his first real case appears in the midst of the exam!














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. 