Recently, I've been concerned about the behavior of my student, Mei. During lessons, she always wears black pantyhose and seems to act in a strangely seductive manner. Crossing her legs, letting her fingertips trail across my body—her touch makes my entire body react as if every inch of me has turned into a sensitive erogenous zone. Mei watches me with a mischievous smile, clearly aware of the effect she has. Her actions became the catalyst that opened the door to an unknown, erotic world.