Teacher Yukari Tanizaki is oblivious, immature, emotional and one of the people shaping young minds. Her students face difficulties in school that most never imagined. For example, as one pupil starts to ask a question, Miss Yukari cuts him off, stating she won't talk about her bra size. Another group of students are ready for their lessons, but instead of learning about social studies or science, they learn how Miss Yukari spent her weekend. Maybe that's not so bad, considering Miss Yukari's not the brightest bulb in the bunch and has her students correcting her on many technical points. Her students aren't sure how to react, but their bewilderment is half the charm of this manga. Like the 1980s TV series Head of the Class, Azu has an eclectic mix of pupils ranging from child geniuses to sports enthusiasts to tough girls; each possessing much more than meets the eye. The precocious child genius may be great at academic subjects, but she still draws like a little girl and has the emotions of a kid. The unemotional tough teen melts for tiny animals and longs to have a pet of her own, even if all of the creatures she comes in contact with seem to hate her. The art is simple and minimalistic, but adequately conveys the thought and emotion behind each strip. Azuma's cast has depth, dimension and character, and their story heartily entertains.

    So they hop aboard their beloved Kettenkrad motorbike and aimlessly wander the ruins of the world they once knew. Day after hopeless day, they look for their next meal and fuel for their ride. But as long as the two are together, even an existence as bleak as theirs has a ray or two of sunshine in it, whether they're sucking down their fill of soup or hunting for machine parts to tinker with. For two girls in a world full of nothing, the experiences and feelings the two share give them something to live for...

    Now she feels drawn toward the aquarium and the two mysterious boys she meets there, Umi and Sora. They were raised by dugongs and hear the same strange calls from the sea as she does.Ruka's dad and the other adults who work at the aquarium are only distantly aware of what the children are experiencing as they get caught up in the mystery of the worldwide disappearance of the oceans' fish.