Shoujo no Michikusa ~Akiba Idol Ura Jijou~

An Akihabara pop idol's shocking hidden side comes to light!

Akiba idols thrive on their innocent image.
That allure is what sells to fans: they seduce with purity, yet remain untouched.
This is the story of a scandalous reality, told with erotic realism.

Minori Ooba is one of Akiba's most popular group members.
To keep that popularity she's started to behave very un-idol-like.

Her behavior draws in the protagonist. Once he's in, there's no escape.

[From DLSite English]