A piano teacher struggles with the dark legacy of his family: he once witnessed his father beating a man to death. Fearing a genetic inclination for violence he struggles to stay sane when he is pulled down the dark path of an illegal firm that sells revenge for hire.
Getsumen to Heiki Mina was a fictitious anime which appeared in the television miniseries Densha Otoko. In the same manner as Kujibiki Unbalance, an anime that began as a fictitious anime/manga within the anime/manga Genshiken, it has been adapted into a television series, which itself was later adapted into a manga series. The 11-episode series has been adapted by the animation studio Gonzo. It premiered on January 13, 2007 on Japan's Fuji TV. Anime News Network has reported that the official pronunciation of the series' title is Getsumen To Heiki Mina, not Getsumen Usagi Heiki Mina. In the Densha Otoko drama, it was named just Getsumen Heiki Mina. The Densha Otoko version of Getsumen Heiki Mina ran for 26 episodes, and the story is completely different from the real-world anime.