The Villain Master in the Book, the Blackened Apprentice Is Forced to Chain His Waist

Asking for Master and Apprentice Articles! the Writing Should Be Good and Logical, and the Heroine Should Be a Little Yandere.

The male protagonist has an old-fashioned and traditional character. He believes that one day he will be a teacher and always a father. He will never do anything that goes beyond the limits. However, he is very good to the female protagonist. It is just a pure master-disciple feeling and compassion. After the female protagonist expresses his feelings, the male protagonist is kicked out in order to avoid the eyes of the world, and the female protagonist becomes dark.