Minami, a female teacher, has always had a complex about her plump, rounded butt. "I can't concentrate on my studies because I'm so worried about my teacher's big butt!" Feeling responsible for the gazes she feels from behind, she thrusts out her plump peach butt and rubs the uncontrollable penis of a student to make him feel better... She is sexually harassed by a fellow teacher for violating discipline, and during a small butt exercise, her trainer plays with her butt and she feels it... Minami learns that big butts are a favorite of men...