Suzu is a 17-year-old high school student living in a rural town with her father. Wounded by the loss of her mother at a young age, Suzu one day discovers the massive online world "U" and dives into this alternate reality as her avatar, Belle. Before long, all of U's eyes are fixed on Belle, when, suddenly, a mysterious dragon-like figure appears before her.
- Genre: Animation, Drama, Science Fiction
- Studio: Studio Chizu, Nippon Television Network Corporation, DENTSU, Toho, Cartoon Saloon, Kadokawa, Hakuhodo DY Media Partners, Yomiuri Telecasting Corporation, BookWalker
- Keyword: society, friendship, love, slice of life, anime, online relationship, virtual world, family ties
- Cast: Kaho Nakamura, Takeru Satoh, Tina Tamashiro, Shota Sometani, Lilas Ikuta, Ryo Narita