Ep. 1: Akira meets a shadowless man named Shirogane who transforms him into a Shin to fight kokuchi monsters.

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Easygoing student Akira Nikaido encounters Shirogane, a shadowless stranger claiming to be a shadow, who vanishes after their meeting. Later, Akira and friend Kengo rescue child Haruka from bullies at an arcade, attracting the attention of school prefect Aya. She demands they accompany her to school to retrieve a forgotten dragon plushie. On the way back, they are attacked by shadow monsters called kokuchi. Aya is injured when her plushie is destroyed, and Akira’s attempt to fight back fails as his sword breaks. Shirogane reappears, creating a barrier to protect them. Akira runs through the barrier, loses his shadow, and faces death. Shirogane offers a deal: Akira becomes a Shin with special powers in exchange for survival. The next morning, Akira learns he cannot return to being human and is invisible to others. Shirogane vanishes, leaving Akira confused but alive.