One day, four school friends, cross the line as they are interested to find out more about sex. Once you spark that flame though it is hard to go back and the bodies and minds of these four people begin to be intricately entwined. This is an adaptation of the "Karami Zakari" best-selling adult manga with over 1 million downloads which is reborn as a Seinen manga! ( the cover doesn’t correspond to the manga yet)