Sensei!

Hibiki Shimada, a normal 17-year-old high school student, still does not know how to fall in love—although surrounded by love "experts"—until one day she realizes that she's fallen in love with her hot and nice 26-year-old teacher, Itou. She then takes a path to make her teacher understand how she feels for him.

Included one-shots:
Volume 1: Tomodachi nante Iwanaide
Volume 4: Chocolate Sensou