Ten no Ryuu Chi no Sakura

Sakura Karukaya enjoys her life as a high school student passionate about rhythmic gymnastics, living with her older brother and sister. Unbeknownst to her, her siblings are concealing truths about themselves and her, revealing that their reality is more complex than it appears. With the assistance of a mysterious dragon-king named Yoiyami, Sakura must face these hidden forces and the latent power within herself to save her siblings.