At Seiryou high school, second year student Masamura Kouji leads a stready, but busy life, alongside with humble and quiet childhood friend Ritsuki Saya and senior student Nishizuku Ruuna. One day, a transfer student, Kasuga Mizuki, appears and hands over a mysterious crystal while uttering enigmatic words : "Please remember...". While being certain the two of them never met, the main protagonist feels they somehow did. A peculiar connection ? (Roughly translated from game cover)

One year has passed. Similar incidents start to happen again in the real world at the same school, so our heroes decide to start an investigation. [Edited from [url=http://psxdatacenter.com/psx2/games2/SLPM-55009.html]Psxdatacenter[/url]]