Ryô Narita
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.
A temporary worker at a company gets involved in a big case when her boyfriend leaves his smartphone in a taxi.
I (Yuko Takeuchi) is a mystery novel writer. I receive a letter from Kubo (Ai Hashimoto), a reader of her novel and a university student. Her letter states that she hears odd sounds from the room where she lives now. I becomes interested by the letter and they being to investigate. I and Kubo learn of people that lived in the apartment and their experiences including a suicide and murder.