Frenemy: Rumble of the Rat

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Ever since the day his father left, Natsuo's world was turned into a living hell. When he is taken into custody by a relative, Natsuo is separated from his younger sister and his best friend, Wataru. While the years matured Natsuo into a young man, his life was still nothing but a disgrace until he is taken under the wing of Kogure. Soon, Kogure appoints Natsuo as manager of a trashy night club; Natsuo's first real chance to make something of his life. But Natsuo is unaware that Kogure, the man whom he confided in, is using him as a pawn in an outrageous bet - a bet that concerns his life!