On a magical Christmas Eve, three homeless companions stumble upon a precious gift in a garbage heap: a newborn they name Kiyoko, symbolizing purity. Determined to reunite Kiyoko with her mother, the trio sets off into the sprawling city, only to be swept into a whirlwind of mysteries involving abduction, loss, and a cryptic crimson envelope. United by their quest to safeguard the innocent infant, the compassionate Hana, rebellious Miyuki, and tough Gin form an unconventional alliance, navigating through challenges that unveil hidden truths and untold connections. As they nurture Kiyoko and strive to unravel her origins, they also find solace in embracing their own histories, inching closer to carving out their rightful place in a world of uncertainties.