Ao Sirotubaki, who owns a flower shop at "Hanagumi", was leading a quiet and ordinary life. Then, after six years of no contact, her twin sister, Beni Sirotubaki, reaches out to her for the first time. What exactly happened between the sisters six years ago, and what do they discuss when they reconnect? Their lives begin to shift significantly as their emotions start to overlap. A suspenseful one-situation film unfolds in the world's first all-cast VTuber production.