Getsumento Heiki Mina is an anime series that began as a fictional anime within the series 'Densha Otoko'. It gained popularity and was later developed into its own standalone series. The story follows Mina Tsukuda, an ordinary high school girl who transforms into a magical girl to protect the Earth from extraterrestrial threats using her rabbit-themed armor and weapons. The series combines elements of magical girl and science fiction genres, offering a unique and entertaining experience.