Mai Hoshino

Mai Hoshino reigns at the pinnacle of her school's social ladder, known to all as a top-tier gyaru. She is also the first student personally selected by teacher Sasaki through the enigmatic shoe locker known as the 'Sinful Yellow Den.' Candid by nature and incapable of hiding her true feelings, she met Sasaki with cutting words when summoned to a deserted classroom late at night—yet her blushing demeanor betrayed her real emotions. It was she who proposed the rule that neither of them should hold back, setting the stage for a forbidden relationship that crossed every boundary between teacher and student.