霊能少女の繁栄と衰退 (Reinou Shoujo no Hanei to Suitai)

Background
The Rise and Fall of the Psychic Girl is track three of Hayakawa-P's Girl Series (少女シリーズ / Shoujo Series). It's a series of songs that tells Len (the boy) who falls in love with Rin (the girl) in different dimensions. However, in the end, Len always fails to get Rin's love / attention.

In this dimension; Len falls in love with a psychic girl who believes in ghosts, spirits, monsters, etc. In the end; it turns out that Len was only Rin's childhood friend, her "imaginary" friend. Rin was all grown up and couldn't see him anymore.

In the end, Len couldn't get her, following the Girl's Series layout.