NKKD-089 Aiming to be an idol, her boyfriend's cosplay was taken before I knew it.

My girlfriend "Kokoro-chan" who goes to the same university has always dreamed of becoming an idol, and while studying, she belongs to a group called "Somehow Saka 69", and it's a PV shoot, a handshake event, Well, anyway, I'm doing my best to do something like a so-called "entertainment activity" ... As a boyfriend's servant, I was supporting her doing her best ... One day, I happened to be watching the recorded video of "Cosplay Her New PV", which I happened to play ...!