In a world covered by an endless sea of sand, there sails an island known as the Mud Whale. In its interior lies an ancient town, where the majority of its inhabitants are said to be "Marked," a double-edged trait that grants them supernatural abilities at the cost of an untimely death. Chakuro is the village archivist; young and curious, he spends his time documenting the discovery of newfound islands. But each one is like the rest—abandoned save for the remnants of those who lived there long ago. For the first time in six months, another island crosses the horizon, so Chakuro and his friends join the scouting group. During the expedition, they find vestiges of an archaic civilization. And inside one of its crumbling remains, Chakuro discovers a girl who will change his destiny and the world inside the Mud Whale as he knows it. [Written by MAL Rewrite]

Umio is a shy kid who just started his part time job at a manga store smack dab in the middle of the city. But his lifestyle isn't as glamorous as the neon lights that illuminate the city. Umio's closest friends are his co-workers who are all unique characters, to say the least, and although they're nice people, they have their quirks. They are a tight knit group of friends, have nicknames for each other and spend their weekends inside, sheltered from the extravagant scene happening on the outside. (Source: MU)

The series is about two boys named Tsukushi and Jin. Tsukushi is a boy with no special talent or traits while Jin is considered a soccer genius. On one stormy night, Jin meets Tsukushi, and they get dragged into the world of soccer. (Source: MAL News)

Daisuke Niwa is a clumsy, block-headed, and wimpy middle school student who has few redeeming qualities. On his 14th birthday, he finally decides to confess his love to his longtime crush Risa Harada, but is rejected. In an unexpected turn of events, however, Daisuke finds himself transforming into Dark Mousy, the infamous phantom thief, whenever his mind is set on Risa. Though Daisuke is unaware of this strange heritage, his mother is certainly not: since before the boy was born, his mother had been planning for him to steal valuable works of art and let the name of the elusive art thief be known. With doubt and confusion constantly clouding his mind, Daisuke finds himself struggling in his relationships with classmates and family. And it is not long before Daisuke realizes that he is not the only one with a fated family legacy—his greatest adversary could be the one classmate he is most unwilling to fight. [Written by MAL Rewrite]