The world is strange. A high school girl whose hobby is exposing herself in school has wandered into some kind of time paradox; when she is found exposing herself and raped, she dies, and is returned to the same place on that day... Amidst indescribable fear, this is a Nana story of her facing this difficulty along with her sexual inclinations. Why do people die, and why are they given life? What's more, she even pursues sex. Tenma Yui is a heretic who infests the main building of the school, which is full of clergymen...She exposes herself even at the risk of her life. At first glance, it may seem meaningless and Nana, but the more meaningless and worthless something is, the more passionate we are about it, which makes us human. Tenma Yui expresses what it means to be human through exposing herself! Reach the Sky - Tenma Yui