Hikari Amanda and Kageya Souta were once inseparable childhood friends, bound by innocent promises made long before they understood what love meant. When Hikari’s family moved away, their time together ended abruptly, leaving only memories behind.

Years later, Hikari rises as a celebrated solo idol whose voice captivates the nation, while Souta becomes a quiet, introverted game developer in Tokyo, still holding onto the past he never forgot. Fate reunites them when Hikari is invited to sing for a game being developed at Souta’s company.

Though their reunion rekindles long-buried feelings, Souta believes standing beside her reflectors would only damage her reputation. Choosing her future over his own happiness, he keeps his distance—unaware that Hikari has never forgotten him, nor the promise they once shared.

As their worlds slowly collide once more, they must confront their fears, the weight of the spotlight, and the love they tried to protect by letting go.