Junichi Tachibana, a second-year high school student, carries a deep emotional scar from a traumatic Christmas two years prior, when a girl stood him up on a romantic date. Since that heartbreaking incident, he has closed himself off from romance, spending his days in cynical isolation, dreaming of manga, and dreading the upcoming holiday season. Determined to break this melancholic cycle and finally experience a memorable Christmas Eve, Junichi resolves to change his fate and forge a genuine connection with a special someone.The series employs a unique omnibus format, dividing the narrative into distinct story arcs dedicated to six different heroines. Each arc acts as an alternate reality where Junichi pursues a specific classmate, allowing every romance to reach a deeply satisfying, emotionally resonant conclusion.In the first arc, Junichi helps his energetic childhood friend, Tsukasa Ayatsuji, win a mock election, uncovering her surprisingly calculating nature and falling for her hidden vulnerability. Next, he navigates the strict discipline and secret shyness of Kaoru Tanamachi, his rebellious peer who desperately needs a fake boyfriend to fend off
unwanted attention. The story then shifts to Sae Nakata, a painfully timid junior whom Junichi coaches to overcome her extreme stage fright and social anxiety, transforming her into a confident young woman.Midway through, Junichi tackles the intellectual and athletic prowess of Rihoko Sakurai, his fiercely loyal best friend who constantly battles her love for food and hidden insecurities about her future. Afterwards, he crosses paths with the mysterious, upperclassman library ghost, Ai Hibiki, helping her overcome family pressures and a fear of swimming. Finally, the series culminates with the flamboyant model, Miya Morishima, who initially treats Junichi like a beloved pet, but gradually comes to see him as an equal and a romantic partner.Across these diverse, parallel journeys, Junichi's motivations evolve from a desperate, self-centered desire to merely salvage his holiday memories into genuine empathy, protectiveness, and love for each unique girl. By confronting his past trauma through these different encounters, Junichi heals his broken heart, transforming his once-dreaded winter into a season of warmth,
personal growth, and triumphant romantic fulfillment, ultimately securing his ideal Christmas with the girl of his dreams.