One of JimmyThumb-P's most popular songs. It was featured in the albums "Reboot", "Gekkaneta Vol.02" and "Koharu Sakurai Presents EXIT TUNES ACADEMY -11th ANNIVERSARY SPECIAL-". The song has reached the Hall of Fame.
The song talks about three young friends (Miku, Luka and Zimi). Zimi gives both girls a star keychain and keeps one for herself as a symbol of their friendship. One day, while walking around town, Luka jokingly shoves Miku, causing her ice cream to drop. A furious Miku shoves back and makes Luka drop her own ice cream. This sparks a fight between the two friends and causes Luka's keychain to fall onto the middle of the street. Zimi runs to retrieve it but is hit by a truck and dies. Miku bears witness to her death and it traumatizes her. Miku blames herself and the two friends eventually go their separate ways, with Zimi's soul unable to move on. Years pass, and Zimi's soul is slowly deteriorating but faithfully follows Luka wherever she goes. Now entering college, Luka and Zimi see a poster for the astronomy club. When they go, they find Miku there. Luka, who blames herself for Zimi's death as well and is angry at Miku for abandoning her, runs away but is caught by Miku. The two friends make amends and they go to the place where Zimi originally gave them their keychains, with both Miku and Luka revealing that they kept theirs as a necklace and an earring respectively. Zimi's soul, happy that her friends are reunited, finally moves on after saying farewell. The song ends with the camera panning to the sky, where three stars, symbolizing the three friends, shine brightly.