In Bakemono no Ko, a boy named Ren faces a bleak reality after losing his mother and feeling abandoned by his family. Venturing into the bustling streets of Shibuya, he stumbles upon the beastly realm of Shibuten. Here, the formidable warrior Kumatetsu, though powerful, lacks companionship and respect. When fate intertwines their paths, Ren becomes Kyuuta under Kumatetsu's mentorship. Despite their stubborn natures, they embark on a turbulent journey of learning and self-discovery. As Kyuuta navigates between worlds, the bond between boy and beast unveils a profound connection transcending their differences.