H2O: Footprints in the Sand

Okano Makoto transferred to the school in his home town. There, he spent normal but happy school days with his sister, Hinata, a jokey classmate, Tachibana Tsutomu, Shikouin Kasumi, Tsutomu's childhood friend, and other friends. One day, after school, Makoto heard someone playing the harmonica. That melody made him feel something old, and it brought him to the roof of the school buildings. There, he met a girl in the dusk. It was Narukaze Minamo who turned her face to him with a smile. She was a childhood friend, but they had lived separately for years. Hiding their true thoughts, Makoto and his friends spend their lives in school. Their stories in a mysterious town are about to begin.

Haneda Takashi has a secret he cannot speak of. To leave his dull school-life, he was supposed to have escaped to another world. However, he is reeled in by certain ties on his heart. One of these is Kobato, his awkward younger sister. The other is Watarai Asuka, his negligent girlfriend. Chitose Shuusuke is a poor freeloader. He passes his days working at various part-time jobs. One day, he has a disastrous first encounter with Tamaizumi Hiyoko. The next time they meet, Shuusuke discovers that they are fellow employees at his part-time job. Narita Hayato sees himself as a "hard-boiled" person. Back-breaking jobs are nothing to him. Hayato shuns normal human contact, but, during the nights, he would get together with delinquents and other denizens of the night. One such night, he meets the cheerful and oblivious Otori Naru. The relationships with these girls will greatly affect these 3 young men. But what, exactly, is the relationship these young men have with each other?

High school student Hodaka leaves his home on an isolated island and moves to Tokyo, but he immediately becomes broke. He lives his days in isolation, but finally finds a job as a writer for a shady occult magazine. After he starts his job, the weather has been rainy day after day. In a corner of the crowded and busy city, Hodaka meets a young woman named Hina. Due to certain circumstances, Hina and her younger brother live together, but have a cheerful and sturdy life. Hina also has a certain power: the power to stop the rain and clear the sky.

Koyama Sachi, a high school girl living in Iwaki City, Fukushima, has been deeply scarred by the Tohoku earthquake of 2011. Since it occurred, she's distanced herself from her friends and family, and shows no interest in people or romance. A violinist since childhood, she's a member of her school's music club and practices every day to prepare for the quartet performance at the school cultural festival. In the midst of all this, she meets Yuusuke, a boy who took refuge in Iwaki after his family was left unable to return home following the great quake, and the two begin to fall in love...