ペンペンペナルティ 箱入り娘たちをHにオシオキ!!

The protagonist, Mimasaka Shun, is a teacher at a young lady's college, and also a professional in life coaching.

One day, three new young ladies went to him, but these were ladies of very strange habits.

With these girls in front of him, Shun's life as an educational coach has just begun!

[Translated from the official site]