A group of college besties find their way through adult life with the help of a strange ability: to hear each other's inner voices. When a long-estranged friend invites the others to a housewarming party, simmering tensions between them come to the surface, and supernatural machinations are revealed.

Daisuke Yuge works as a tour guide in Oahu, Hawaii and also studies astronomy. He meets Rui Fujishima at a cafe and falls in love with her at first sight, but Rui Fujishima suffers from memory loss due to a past accident.

A pre-wedding reunion descends into a psychological nightmare for a group of college friends when a surprise guest arrives with a mysterious suitcase.