The narrative centers on Sakuta Azusada, a college student whose life is once again disrupted by the enigmatic Adolescence Syndrome. Following the resolution of high school anomalies, Sakuta looks forward to a peaceful routine with his girlfriend, movie star Mai Sakurajima. However, reality shifts when a mysterious, older version of Mai suddenly appears, alongside a vibrant newcomer named Koga, who harbors unresolved romantic tensions from the past. This temporal and emotional anomaly forces Sakuta to confront the lingering regrets he tried to bury.The core conflict escalates when Futaba, suffering from her own
existential crisis regarding identity and affection, triggers a localized psychological distortion that alters the physical environment of their university campus. Sakuta finds himself emotionally vulnerable as his relationships are tested by manifestations of his deepest insecurities—chiefly, his fear of losing Mai to her escalating career and the burden of his past failures. Mai, meanwhile, is determined to protect Sakuta, even as her own duplicate challenges her autonomy and public image.As the surreal phenomena intensify, the boundaries between dreams, memories, and waking life begin to blur dangerously. Sakuta discovers that the anomalies are fueled by collective societal observation and unexpressed desires. To restore order, he must navigate a labyrinth of emotional truths, confronting not only the manifestations of his friends' traumas but also his own latent desires and fears of intimacy. Through intense late-night confrontations and raw emotional revelations, Sakuta learns to accept the unpredictable nature of
human connection.The climax unfolds during a rainy evening outside the campus station, where Sakuta faces the alternate Mai in a symbolic duel of acceptance and letting go. By acknowledging that love requires vulnerability and that the past cannot dictate the present, Sakuta dismantles the syndrome's hold over the group. The duplicates fade away, leaving behind a profound sense of catharsis. In the aftermath, Sakuta and Mai reaffirm their bond, stronger and more mature than before, ready to face the uncertainties of adulthood together while cherishing the fleeting, fragile moments of youth they have managed to preserve.