Saimin Classmate ~ Yasuko wa Ore no Kotoba de Midareru!

Nobuhiro Kijo wanted to chat with the cute librarian Yasuko Nonomura, and ended up borrowing a book.
It was a guide to hypnotism.

Why was this sort of book in the school library? he wondered, as he began reading with interest.
When he tested its tactics on Yasuko during their conversation, she fell into a trance...

[From DLsite English]