Mii-kun, a reserved individual, and his vivacious companion, Kei-chan, share a deep bond forged in the wintry rural landscape where they first connected. However, their unbreakable friendship faces a test when Kei-chan enters a romantic relationship, leaving Mii-kun grappling with unrequited feelings. As their dynamic evolves, what new challenges will they confront, and how will this shift impact their relationship?