[Black Contract] the Blue Star Burns Out

After the Tokyo explosion, Nakahara Ao and his doll began a journey to find Hei according to their agreement with Kohaku and Shiro. Falling in love with the man who oscillates between being a contractor and a human being, this strange feeling is incompatible with the contractor's thinking. Guard your love, abide by the agreement, and maintain your love before the twins in the shooting star come to Tokyo.