Mizuiro (2003)

In the home where the parents are frequently absent, the younger brother and sister-in-law reside. The younger sister, Yuki, has a secret crush on the older brother, Kenji. However, after a particular night, one girl began to emerge from Kenji's room's closet. She also has a transparent physique, giving her a ghostly appearance. Hiyori is her name. She was a childhood friend of theirs. Despite Kenji and Yuki's confusion about Hiyori's peculiar appearance, they are happy to be reunited. However, as Kenji and Hiyori develop a close relationship, Yuki feels her mind rattled and is reminded of the pain she experienced as a child. In exchange for Hiyori's yo-yo, Yuki was going to provide Kenji's light blue toy ring that he had as a child. However, the promise was not fulfilled since Hiyori moved and was ill. Their childhood experiences appear to be connected to Hiyori's appearance in front of them. Kenji's arduous love affair with two girls develops.