D_Cide Traumerei the Animation (2021)

Set against the vibrant backdrop of Shibuya, Ryuhei idolizes his older brother, whose enigmatic death haunts him. Now a lively high school student, Ryuhei's life takes a bizarre turn after a kickboxing session when he encounters a peculiar creature named Tris. That night, unsettling dreams invade his sleep, introducing him to the city’s ominous "Drops." As he navigates this realm of distorted desires, Ryuhei must confront the mysteries that lie ahead, questioning the true nature of his reality and the shadows of his past.