Kyosuke Kano has lived under the shadow of his successful brother Seisuke all his life who is a professional soccer player.

Misaki Ayuzawa is the first female student council president at a once all-boys school turned co-ed. She rules the school with strict discipline demeanor. But she has a secret—she works at a maid cafe due to her families circumstances. One day the popular A-student and notorious heart breaker Takumi Usui finds out her secret and makes a deal with her to keep it hush from the school in exchange for spending some time with him.

Monkey Typhoon tells the story of three asobots —a form of robots whose general title is a portmanteau of the words association and robot— Goku, Tongo, and Joe. They are assisted in their journeys by Sanzo, a human, the son of the creator of the asobots, and Suzie, who joined them after her father was cured from the Destruction Virus. Later on they are joined by their former rivals Miyon and Shiyon. Their quest is to stop their world's destruction by collecting the legendary 49 keys to unlock Tokyo Metropolitan Government. Along the way, the asobots gain the ability to evolve further. Together, in their many voyages, they come across several foes and enemies such as Loki, Ryutaro Demon, the Quartet, King Doberman Pinscher, and many more, as well as grow united in their friendship.

21世紀以來，日本自動車工業有了驚異的變革，藉由裝載人工智慧，讓每個人都能安全地開車上路的「AI Car」正式開發生產。而在如今的2012年，被視為模範機能城市的橫濱新都心內，有著一所專門培訓小孩子AI Car駕駛技術的特別學校「阿卡迪亞學園　ARCADIA」。

就讀阿卡迪亞學園五年級的轟驅流，是個個性莽撞卻有著天賦異稟駕駛技術的少年。某日，在學園長的邀請之下，和座車「Libird」相遇。事實上，阿卡迪亞是根據「螺旋石碑」之警告預言，而成立對抗犯罪組織的秘密防衛機關。

2039年、人類由暖化伴隨的海面急劇上升、於陸上失去了龐大版圖。

猶如與其呼應、雲纏霧繞的莫名軍艦群「霧之艦隊」出現在世界各地的海洋、以搭載之超兵器開始攻擊人類船艦。

人類投入持盈履滿的戰力、面臨最終決戰「大海戰」、反在「霧」的壓倒性武力前脆弱地落敗。

全海域、搬運途徑都遭「霧之艦隊」封鎖、政治經濟於是崩壞、人類走回疲弊一路 —————

自「大海戰」後七年。

士官候補生・千早群像面前浮現了「霧之艦隊」的潜水艦「I-401」。

當是敵人的「I-401」、會對其心智模型「IONA」邂逅的群像、以及人類帶來什麼呢？

Every day, a young girl wearing a mask stands by the beach and sings a nostalgic melody. After experiencing two sudden heart-wrenching partings when she was only a child, Nino Arisugawa has been singing her songs to the ocean, bound by a promise made with her two childhood friends—her first love, Momo Sakaki, and a boy who composed music, Kanade "Yuzu" Yuzuhira. Having never met each other, the boys both individually promised that if Nino was ever separated from them, her voice would be the beacon to reunite them once again.

After six long years, destiny has finally placed Nino, Momo, and Yuzu in the same high school. However, the passage of time has changed many things in their lives—while Nino relentlessly attempts to fulfill her childhood promise with the boys, Yuzu's feelings for her from the past resurface, and Momo goes to great lengths to prevent a reunion with Nino. Through music, will they be able to mend their friendship and overcome all the feelings involved in this complicated love triangle?