Umisho

What if roller skates had high power engines that enabled the skaters to do stunning new tricks that defy gravity? What if you saw a beautiful girl effortlessly glide through the air with them? To Ikki, this is reason enough to secretly borrow a pair of Air Treck skates, and step into an underground world filled with gang fights and strange customs. Enamored with high-flying stunts and the flirtatious Simca, Ikki forms an Air Treck gang of his own and starts a life of fighting rival gangs and flying over the rooftops, chasing the girl always one kick ahead of him.

While visiting his hometown, junior high school student Michishio Nagasumi's life was changed forever when he nearly drowned. Though he was saved by a mermaid named San, there’s a catch -- her family is part of a merfolk mafia, and they abide by a strict rule: If a mermaid is discovered by a man, either he or the mermaid must die. That is, unless the man marries into the family! Faced with such a decision, Nagasumi can only oblige their customs and become a "happy" newlywed. Now, with a new school year around the corner, Nagasumi must find a way to deal with his new bride, keep her true nature a secret, and most importantly, escape inevitable death at the hands of San's over-protective father’s gang!

The Kawahira family specializes in dealing with troublesome spirits with the help of inukami, strong dog spirits that take human form. Members of the family are expected to make pacts with strong inukami in order to fulfill their duties, but their family has a black sheep: the perverted Keita, who charges people for his help. His inukami, Youko, is dedicated to make Keita completely hers. Her favorite form of punishment for him when he strays is teleporting him into the city completely naked. He's been arrested for indecent exposure so many times that he's a jailhouse regular, and is considered an outcast by his family and normal society; yet an inukami of the highest caliber chose to be his partner?! Is there really more to him than perverseness?