Miss Succubus, it's time to learn

One hundred years ago, the passage between humans and demons was opened, and trade relations were established between the two.
Human technology and capital poured into the demon world in large quantities. The demons learned human civilization and technology, and humans obtained the demons' magic tools and labor.
Du Wei, who was preparing to go to the Demon Realm for a graduation trip, accidentally encountered a bumpy teleportation array and fell into the most remote town in the Demon Realm.
In order to earn money to return to the human world, Du Wei became a private tutor for a succubus who stayed at home and taught her knowledge about the human world.
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"Ms. Luo Dai, today's class ends here. Succubi must get enough sleep before they reach adulthood. Please go to sleep after drinking the milk."
"I hate milk, and I want to drink tomato juice like Colette."
"Ms. Colette is a vampire and will become a vampire that sucks human blood in the future. Tomato juice is a training product before she reaches adulthood.
"Come on, drink the milk."
Miss Succubus looked at the steaming milk with a look of disgust.
"You were in my mother's room last night and gave her this drink?"
"You guess."
This book is also known as "The Man in the Demon World, Picked Up by the Succubus Mother at the Beginning"