Nagasumi, a teenage boy, is saved by the chivalrous mermaid Sun while drowning in the ocean off the coast of Seto Isl...

Nagasumi enjoys his first date with Sun at the Bon Festival. However, most stalls are operated by the Seto-Gumi. Late...

Sun and Nagasumi get to spend a whole day alone on a deserted island. However, this is a trap meant to eliminate Naga...

As a dutiful wife, Sun follows Nagasumi back to his house in the city, where she is to live with him and his parents....

Sun and Nagasumi attend their first day of school. Sun's father and the gang have all become teachers at their junior...

Mawari notices Sun's fishtail and comes to the conclusion that Sun is a fish. She keeps trying to splash Sun with wat...

Nagasumi runs into Lunar, a popstar idol; her mermaid form is accidentally revealed to him. In turn, Lunar plans on m...

The situation at school keeps escalating, and even Maki is hurt in the process. In order to avoid total war, Nagasumi...

Nagasumi's life only gets more hectic with the arrival of Kai Mikawa, a handsome, rich, but agoraphobic merman, who i...

A strange, huge, practically invincible man, stalks Nagasumi and nothing can get in his way. Nagasumi tries to tell h...

After Sun and Lunar go on a diet, Sun's father buys her all sorts of presents to help her out, including some special...

Nagasumi's mom and Sun go shopping for groceries, leaving Lunar alone with Nagasumi. Lunar plans to make her "slave" ...

Nagasumi is taken back to Lunar's house where a wedding ceremony is going to soon begin. Moments before Nagasumi is m...

Nagasumi finds a kitten and brings it to school. Nagasumi soon discovers that Sun, Lunar, and Maki are all deathly af...

Nagasumi, Sun, Lunar, Mawari, Saru, and Mikawa go on what is supposed to be a double date. As Nagasumi goes to get a ...

Akeno Shiranui, a mermaid examiner has come to record and observe mermaids that doesn't fit well with humans and send...

Defeated by Akeno, a group of delinquent lords follow her around which mislead Mawari into believing Akeno was also a...

The whole class went for a sudden trip to Kyoto. After an incident where Maki attacked Akeno, Sun apologizes to her, ...

After the attempt to rid of Nagasumi from Sun fails. Akeno is now undertaking a mission, to foil Nagasumi by forcing ...

Lunar's father searches for ways to express his love and cheer up his precious daughter when he accidentally spots a ...

Nagasumi receives a love letter from the class president. Being the first love letter he has received in is life, he ...

Lunar tries hard to practice her part in a drama. She gets Sun to help her be her lover as a man. Unfortunately, Sun ...

Believing Masa was an acquintance of her older brother, Akeno asks Masa about her brother's whereabouts, but Masa had...

Kai has an embarrassing problem about himself that he wants to keep a secret from others. It ends up that he just has...

It is first time that Sun and Nagasumi has a quarrel, and both end up not talking to each other. At the same time, th...

Nagasumi, Kai, and Lunar go to save Sun. Once they get there, the Seto Group manages to break free and a huge battle ...