Amidst the routine and exhausting life in Tokyo, white-collar worker Rin had long buried her dream of becoming a fashion designer. On a rainy night, she happened to meet Alex, a Finnish photographer living abroad. From the eye contact at the street corner to the midnight escape rushing to Mount Fuji, their only two intersections and his gentle gaze through the lens awakened Rin's dormant heart like a tremor. In the captured smiles and the courage to reclaim her dreams, she rediscovered the vitality of creation and embraced a heartbeat destined to part. Under Mount Fuji, Heartbeat Out of Control tells of forgotten dreams, unsaid love, and moments turned into eternity.