This is a world where both men and monsters exist. Those who hunt the monsters are called Hunters. But in a small corner of the Hunter's world, there are those called Riders who bond with and coexist with monsters. With their Kizuna Ishi (Bonding Stones) that allow them to awaken the hidden power inside monsters, Riders live in secrecy together with their Otomon, the monsters they formed a connection with. Ryuto, a young boy living in the Rider village of Hakum, dreams of becoming the world's best Rider. Having just turned 12, he sets out to find his own Otomon for himself before the ceremony where he is given his own Kizuna Ishi. Together with his kind-hearted childhood friend Cheval, his inquisitive childhood friend Lilia, and his partner Naville, he sets out deep into the forest, and has a miraculous encounter with a Rathalos. (Source: ANN, edited)

On Filiel's 15th birthday, she received her mother's necklace as a memento from her obstinate astronomer father. Her common and tedious life was turned into a life of conspiracies. With her new life, many adventures await. (Source: ANN)

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]

Ichigo Momomiya expected her date with her crush, Masaya Aoyama, to have a more romantic ending than her falling asleep after she sees a vision of a cat entering her body. Things get even stranger when, the next day, she begins displaying cat-like behaviors such as an intense craving for fish. When Masaya is attacked by a monster, she discovers that she is able to transform into the cat-eared magical girl, Mew Ichigo. After she saves Masaya, two researchers named Ryou Shirogane and Keiichiro Akasaka approach her and reveal they had injected her with Iriomote Cat DNA in order to create a magical girl that can save the world from aliens. Ichigo is tasked with fighting these monsters, but saving the world proves to be just too much for Ichigo to handle by herself. Fortunately, she learns that there are four other girls just like her, and now, Ichigo must find them quickly before the aliens completely take over the planet. [Written by MAL Rewrite]