This is the first game by hourglass. With graduation fast approaching, Motonaga is told by his classmate and love interest Mizuku that she has been called back for a second audition for Production Chaos Promotion along with his imouto Yura. She had applied for it because she likes singing and wanted to make a career out of it. He decides to support her. Both of them pass the audition, along with another cool girl Asuka, and they form a trio called Primo Amore. Motonoga wants to help them more and starts working part-time as the manager’s assistant. The producer decides to shoot their first PV at a quiet scenic spot named Ayashino, which is far away from the city and is accessible only via one road. However, strange things start happening...
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