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Qiáng, a shadow Koshi who had to hide the fact while receiving the favor of the dragon god, was leading a carefree school life as a lover of the captain of the dragon tiger squad, Tokiwa.
However, as the monthly ceremony approaches, dark clouds hang around them.
The return of Koshi's candidate, Shiragiku, who was in the hospital. And the secret activity of Tokiwa's old lover, Tsubaki.
The decision made by Qiáng, who was at the mercy of Tokiwa and had a hard time, creates a distortion between Tokiwa and him?
The boys are bound by love in a prison named Gakuen.