Yankee Seito ni Nameraretemasu!

"New teachers always fall for this." Aya returned to her old school as a teacher, 10 years after she graduated. When she was about to be bullied by the unruly students in her class, she was rescued by a handsome delinquent, Yoshizawa. She thought he was a nice guy, but he will play a nasty prank on her! (Source: Renta, translated)