Based on the erotic game by Akabei Soft3. 
 
Alternative Story:
The story of a girl who is trying her best maintaining her popularity as an idol by becoming a "pillow idol". 
 
Details Story:
In order to become a famous Idol and idolized many people, Reina willing to do anything. Although it should have sex though. This is the story of Reina's trip to become a famous Idol, starting from her first meet and greet session, and also sacrificing her body. 
 
(Source: VNDB and Nekopoi that has been translated)

Teakamamire no Tenshi THE ANIMATION