"U" is a popular social media platform where people can create a virtual persona and start a new life. Among its five billion users, one newcomer is quickly gaining attention: Belle, a beautiful singer whose alluring melodies slowly capture the hearts of the masses. But in this space where everyone hides behind an avatar, curiosity arises over who the mysterious girl truly is. Suzu Naito—a shy girl from the countryside—can no longer sing following past trauma, all her efforts resulting in breakdowns and illness. However, when Suzu joins U, she is once again able to project her voice. Under the alias "Belle," her vocals soon go viral, receiving both love and hatred. Meanwhile, rumors spread of a chaotic beast within U, known only as "The Dragon." After a chance meeting during her concert, Belle finds he is not as evil as the stories suggest. Now, both online and in the real world, Suzu has to face the struggles of identity, fame, and opening one's heart.

Hana, a hard-working college student, falls in love with a mysterious man who attends one of her classes though he is not an actual student. As it turns out, he is not truly human either. On a full moon night, he transforms, revealing that he is the last werewolf alive. Despite this, Hana's love remains strong, and the two ultimately decide to start a family. Hana gives birth to two healthy children—Ame, born during rainfall, and Yuki, born during snowfall—both possessing the ability to turn into wolves, a trait inherited from their father. All too soon, however, the sudden death of her lover devastates Hana's life, leaving her to raise a peculiar family completely on her own. The stress of raising her wild-natured children in a densely populated city, all while keeping their identity a secret, culminates in a decision to move to the countryside, where she hopes Ame and Yuki can live a life free from the judgments of society. Wolf Children is the heartwarming story about the challenges of being a single mother in an unforgiving modern world.