Mari Kuzuryu is discriminated against for having a sadistic murderer as her brother and is contemplating suicide when she is saved by a passing university professor, Rentaro Mizuta. Mari and Rentaro fall in love and marry, and it seems she has found happiness, but Rentaro is brutally murdered shortly thereafter by the family of the victim of a murder committed by Mari's brother. Having lost everything once again, Mari is confronted by Rentaro, reincarnated as a puppy. This is the true essence of Tokuhiro's style, where perverted gags and seriousness are perfectly synchronized!