Kokomi, a high school girl who is about to take her entrance exams, is often molested on the morning bus to school!It's always before her period, when her body starts to become sensitive... Kokomi has no choice but to endure. She was unable to speak out due to fear, and at the same time endured the embarrassment she felt from the man's fingertips! Before she knew it, the molestation boldly escalated!