The story centers on Mizutani Masayuki, an ordinary high school boy. His classmate Shimizu Sayaka lives in his home as a zealously intrusive maid, leading to uncomfortably erotic situations.

A psychic ninja fantasy suggesting that the assassins did not die out during the Sengoku era but burrowed under Japan, where they fought a new war against the alien occupants of a crashed spaceship that has lain undisturbed for several millennia.

The children’s anime revolves around Velonica, a high-handed and ultra-selfish little alien girl on the Galaxy Network, who begins to cause havoc on Earth. After a “fated encounter” with an Earthling boy, Velonica wavers between a possible budding romance with the boy and her dedication to the arts.

This series continues the adventures of Katta Kirifuda, Bucyake and Yohdel throughout the school season. They meet new classmates such as Leo to duel against. (Source: Duel Masters Wikia)