one summer day.Aika didn't realize she was drinking more water than usual. (...!!) A sudden urge to urinate unexpectedly. (Ah... my limit...) Above all, I'm in a train with no escape.Office workers and students who seem to be free around.A hot gaze of curiosity showered mercilessly.Before long, the men's hands begin to reach for Aika's body, who has no choice but to stand still in fear and shame... “Hey, stop it!…Are you okay?” Aika thought that voice was her savior.She believed so.But this voice of salvation was the beginning of the eternal hell.