I Was the Weakest of the Four Heavenly Kings. Since I Have Reincarnated, I Want to Lead a Peaceful Life Chapter 9

[yetie]

A general of the demon army gets betrayed by other generals, he than get recarnated as a human.
in chapter 9, a teacher gets drugged by acident by a love drug.
the main guy and the girl in love with him than tie up the nun to protect her