Haji+ Shinchishin episode 1

Taiki, a perverted teacher who loves to witness the embarrassment of a beautiful girl.
Taiki has enjoyed watching his childhood friend, Hina, endure shame by tying and groping her, but recently he feels like he’s in a rut. In order to make the most of her position, she was looking for a new test subject…Mina Shijo, a beautiful girl who became a candidate for such a pervert
Mina, the daughter of an old family, is good-natured, bright and cheerful, and a good girl who can get along with anyone.
Although she is a little lacking, and she is also a disappointing child who plunges into wrong things indiscriminately  Mc planning a situation where Mina can’t resist his humiliation