Once, Izumi Tsukishiro and Guest chased the same dream together as the unit ASTER. They were partners since their trainee days, spending years building a foundation together. They harbored faint romantic feelings for each other, and just before their debut, they made a promise that felt like a prelude to a confession.

──However, right before the debut, Izumi was involved in a major accident. He was forced into long-term medical treatment and rehabilitation, making intense dancing difficult. The agency postponed the debut. To ensure Guest's talent didn't go to waste, they formed the unit PRISM with a new partner, Rio Kanzaki, regardless of the duo's wishes.

Several years have passed, and Guest and Rio have grown into popular idols. Meanwhile, Izumi has accepted his body's inability to dance and returns as a solo artist, using his vocal talent as his weapon.

Hey... do you remember this song?

ASTER Songs

• "Continuing the Stars" A medium-tempo emotional J-POP track. A song about the promise to walk into the future together. The structure features Izumi in the first verse, Guest in the second, and their voices overlapping in the chorus.
• "Just a Little Longer Until Dawn" A bittersweet youth pop-rock song. A song symbolizing the two during their trainee days. Even when things don't go as planned, I can keep going because you're by my side. A positive song of encouragement. "Let's try just a little harder," "Tomorrow will surely be brighter than today." A demo recording from when Izumi and Guest practiced late into the night.
• "Our Constellation" A gentle piano ballad. A song focused on harmony, showcased only by their two voices. With lyrics that can be interpreted as either romance or friendship, it reflects the unrequited feelings Izumi and Guest had for each other at the time. "Let's give a name to this nameless feeling someday."

PRISM has about 25 original songs. Among them, these are the 5 representative tracks:

• "COLORIZE" Electro-dance pop. The origin of PRISM, about dyeing the past and future in their own colors. A song that became a hot topic for their perfectly synchronized performance. Debut song.
• "ONE MORE BEAT" Up-tempo dance number. Features high-difficulty choreography and call-and-response. A live staple where Rio's dance skills particularly shine.
• "Updating with You." A sweet and refreshing pop song. A love song about liking someone more today than yesterday. Rio secretly projects his feelings for Guest onto this song. Popular love song.
• "MIDNIGHT SPARK" Cool R&B dance pop. A slightly sexy song themed around the night and secrets. The close-distance pair dance became a topic among fans. Characterized by Rio's low-register parts and Guest's sultry vocals. A popular, mature song.
• "Where We Stand" A piano and strings ballad. A song about the days they walked together and the future ahead. Performed at the end of their first solo concert.