Ore no Onshi wa Kuso Bitch

The school was famous for its beautiful teachers. His friend, who went elsewhere, was jealous. Of course, he told that friend there was nothing to be jealous about. They were teachers, and they were perfect flowers. Way out of everyone's league. Unattainable.

That's what he told his friend, but to himself, he'd made a vow: to screw that one teacher he yearned for most of all, even if he had to take her by force. Of course, he seemed hopeless... until suddenly another teacher invited him to a midnight hotel rendezvous. Timid as a mouse he met the gorgeous woman. Seeing her at night, outside of class, was disorienting. She oozed sensuality like a harlot, and like a harlot, she embraced him and blew his mind. It was the sexiest revelation of his life.

"My teacher... is such a... freaking nymphomaniac...!"

[From DLsite English]