Karamaru Himono Akai Ato

Entwined In Red ; Karamaru Himo no Akai Ato ; 絡まる紐の赤い痕

On the surface, Asai is your picture-perfect "normal" high school student. However, he has always pretended not to notice the burning desire he harbors deep inside him... that is, the intense excitement he feels from seeing someone tied up in red ropes and the marks they leave behind on their pale skin. One day, Asai reluctantly delivers a printout to his classmate, Rui, who is rumored to be the son of a gang member. When he peers inside Rui's home from the open cracks of his door... he finds his classmate bound in red ropes as a man caresses his bare body...