Magikano

Kazuki Shikimori is a 17-year old junior studying at Aoi Academy, an elite school for the magically gifted. However, unlike enrollment to the school would suggest, his magical prowess is below-average. In fact, he can only use magic eight times in his life, or he will die. But not all is not lost: Kazuki's family tree includes the latent genetic material for magical greatness. After that information leaks out, Kazuki suddenly becomes the most popular male student in the school, and girls from powerful magician families begin chasing him to get his genes.

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!

Angels are genteel and graceful messengers from Heaven, right? Wrong! Sakura Kusakabe will create an invention that inadvertently ruins the future for womankind and thus, angels from the future have arrived to do the only reasonable thing: assassinate him! Fortunately for Sakura, one of them, Dokuro-chan, takes a liking to him but her intentions to protect him prove downright lethal. When Sakura’s not dodging her spiked bat Excalibolg, he’s fighting for his life on river escapades. And when he’s not quick enough, Dokuro-chan’s catchy incantation brings him back to life! Bludgeoning and blood splatters aside, can Dokuro-chan save the one she loves without damaging the future?