As our humble corporatist Itonami Norio is suddenly summoned to another world, it would look as if he'll be sent to a battlefield-- he, however, holds no skill to speak of, and as he is deemed to be useless. He negotiates with The King and receives a plot of land -- an empty, deserted plot of land, with no inhabitant in sight. Norio holds something he couldn't bring himself to tell anyone: The Master of Supremacy, a gift which will grant him the most comfortable of lives in this world. Hereby begins the Norio's colorful story -- having a mermaid he fishes declare herself his wife, becoming neighbors with the Undead King, this is his busy but enjoyable life -- and now a dragon appears ?!

From Shinnen:
Hibiki and Tomoe Kazema are two sisters attending an ordinary high school, but unbeknown to their teachers and fellow students, they are members of a hidden group of ninjas. Their mission is to use their special powers to exterminate the akuma that are plaguing the world. This is made difficult by the fact that their enemies can possess corrupted humans who eventually turn into new akuma.
Despite being faced with an ever growing army, the two are determined to prevail as "The two flowers that will slice through the darkness." The only question that remains is will they succeed against such overwhelming odds?