Second year high school student Koguma doesn't lead a very interesting life. She has no parents, and no friends nor hobbies to keep her daily life busy. One day, she acquires a second-hand Honda Super Cub motorcycle and rides it to school. As time goes by, not only does Koguma have a new adventurous life, but she also forges precious friendships thanks to her precious little motorcycle.

Neku Sakuraba, a 15-year-old boy with a hobby for music and graffiti, wakes up in what seems to be the Shibuya shopping district of Tokyo, Japan. With no idea why he's there, he opens his hand to realize he is holding a strange black pin. After flipping it with his hand, the thoughts of the people surrounding him begins to flow into his head at once. Surprised, Neku discovers he is able to read the minds of others and assumes it has something to do with the black pin he is holding. A cell phone starts to ring in his pocket, and he can't tell whether it is his or not. A text message appears: "Reach 104. You have 60 minutes. Fail, and face erasure. -The Reapers." After discovering he can't delete the message, a timer of 60 minutes imprints onto his right hand. Neku is in Shibuya to play the "Reapers' Game," which spans a total of seven days. All Players of the Reapers' Game have a black pin with a skull embedded on it. (Source: Wikipedia, edited)

One day, Yomogi Asanaka, a first-year student at Fujiyokidai High School, runs into a mysterious man named Gauma who claims to be a “kaiju user.” The sudden appearance of a kaiju is followed by the entry of the gigantic robot, Dynazenon. In the wrong place at the wrong time are Yume Minami, Koyomi Yamanaka, and Chise Asukagawa, who are dragged into the fight against the kaiju. (Source: Funimation)

Deep in the Ararat Mountains of Turkey, a secret organization known as ARCAM has found what is believed to be Noah's Ark. However, the U.S. Machine Corps., a rogue organization of the Pentagon, wants to take over the Ark as a means of global supremacy. Only a special ARCAM operative known as a Spriggan stands in their way. Japanese Spriggan Yu Ominae teams up with French Spriggan Jean-Jacques Mondo to combat members of the U.S. Machine Corps. led by Col. MacDougall—a genetically-enhanced boy with deadly psionic powers. However, they must act fast and stop MacDougall before he uses the Ark for his own agenda.