Himari Kino is a cheerful and outgoing girl who is able to make friends with anyone she wants. When she enrolls in high school and attends the freshman opening ceremony, Himari falls in love with Yori Asanagi, a reserved upperclassman, during Yori's band performance. After the show, Himari blurts out her love, but Yori is inexperienced when it comes to romance. Yori, who did not expect this outcome at all, looks for answers from her friends and music. She decides to respond to Himari's confession, and to her surprise, Yori discovers that Himari fell in love with her music and performance rather than Yori as a person. Despite the shock, Yori desires to make Himari truly fall in love with her. The duo spend time together after school on the rooftop, where Yori usually plays her guitar with hopes to change Himari's feelings for her.

After an accident sent her family to their deaths in the ocean, Hinako Yaotose keeps returning to the thought of sinking forever into the sea herself. With Miko Yashiro as her only friend, Hinako manages to keep up a semi-happy facade, but whenever Miko leaves her side, she slips into despair. Everything changes one summer when she meets a mysterious girl with eyes as deep and clear as the sea, drawing Hinako in like nothing else has in a long time. During her absent-minded search for the girl, Hinako is suddenly pulled underwater by a beastly deep-sea creature, only to awaken to the presence of the girl—Shiori Oumi—who takes on a monstrous form and kills Hinako's attacker. Despite this heroic act, Shiori's intentions are no different from any other monster's: she wants to eat Hinako. The following morning, Shiori walks into Hinako's class as a transfer student, and Hinako cannot help but smile—at last, someone who could fulfill her quiet wish for death has appeared before her.

The world of dreams can be an incredible window into the psyche, showing one's deepest desires, aspirations, and repressed memories. One hopeful tech lab has been developing the "DC Mini," a device with the power to delve into the dreams of others. Atsuko Chiba and Kosaku Tokita have been tirelessly working to develop this technology with the hopes of using it to deeply explore patients' minds and help cure them of their psychological disorders.

However, having access to the deepest corners of a person's mind comes with a tremendous responsibility. In the wrong hands, the DC Mini could be used as a form of psychological terrorism and cause mental breakdowns in the minds of targets. When this technology is stolen and people around them start acting strangely, Atsuko and Kosaku know they have a serious problem on their hands. Enlisting the help of Officer Konakawa, who has been receiving this experimental therapy, they search both the real and dream worlds for their mental terrorist.

[Written by MAL Rewrite]

With its gorgeous landscape and prosperous people, Great Japan is the envy of all other nations. But a serious threat hovers over the country. Mysterious guardians known as Master Samurai are Great Japan's only defense. At the behest of the student council, young samurai Muneakira Yagyuu arrives at Buou Academic School. Run by the Tokugawa Shogunate, here children of warriors are given aristocratic education required to run the country. The school is led by the student council president Yoshihiko Tokugawa and his sister Sen, who also happens to be Muneakira's childhood friend. Upon arriving at the academy, Muneakira finds himself in the midst of a terrible fight. During the chaos, the sky fills with a peculiar white light and a mysterious girl named Juubei Yagyuu appears and suddenly kisses Muneakira. With his kiss, she awakens an unknown power that protects them. Just who is this girl, and where did she come from? Muneakira finds himself entangled in the fate of the country and a threat that will shake Great Japan to its core. He must learn the secret behind the Master Samurai and the kiss that awakened Juubei's power in order to protect his country.