Every 12 years, mercenaries who possess the highest caliber of brute strength, cunning wit, and deadly precision gather to participate in the Zodiac Tournament. Each warrior bears the name and attributes of one of the 12 animals of the Chinese zodiac. With their pride and lives on the line, they engage in vicious combat until only the victor remains. The 12th Zodiac Tournament begins in a desolate city, devoid of any evidence of the half million people who recently lived there. To raise the stakes, each warrior ingests a poisonous gem, thus setting a time limit on the tournament—and on their life. With one wish for the victor up for grabs, the Zodiac Warriors start their cutthroat battle for survival. [Written by MAL Rewrite]

The story revolves around Kibayashi, a teacher whose hobby is speaking with the dead and whose special talent is exorcism. She seems to know everything about the other world, yet nothing about our own. (Source: AniDB)

Mary Bell, a magical girl who looks like a girl around five years old, comes to the human world from a magical world called "Flower Magic World", and helps and encourages people. (Source: Wikipedia)

High school student Yoshiki Maeda is starting a new year in the all-boys Baraman High School. On the first day, Yoshiki reconnects with his childhood friend, Takuya Saotome, and meets his odd and dramatic homeroom teacher, Teruhiko Saionji. Yoshiki’s younger sister, Yuu, is aware of many of these handsome boys and seems to take pleasure in teasing her big brother about them. Yoshiki soon discovers a number of stereotypical romance characters and has no choice but to deal with their outright ludicrous and nonsensical boys' love antics. [Written by MAL Rewrite]