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Hina Hikawa finds herself stuck in a killing game while planning to have fun at Kokoro's private beach for the summer with all the other girl bands.

This story takes place on a island, but with hotels and other necessities because Kokoro is rich.
Hina is the protagonist, but some POV switches can happen, and you can choose who that person is. Some parts of the story are interactive, so they require you to comment.

//I just realized that 'Scarlet Stage' is the name of the persona5 event in bandori but its too late to go back now