Kurumi reunited with her childhood friend Nagio after many years, and later became a couple with him. Kurumi’s doting brother, Ataka, repeatedly tried to get in the way of their romance, but in spite of that, the two of them still carried on with their loving relationship. They would kiss each other every single day. However, it seemed like Nagio wanted to go beyond just kissing…?! This is a childhood friend romance story starring a black-hearted yet loving boy, filled with sweet and passionate kisses!