Heptagon

Nana, a 24-year-old who feels indifferent and unfulfilled in her life, experiences a car accident. She wakes up to find herself back in her 14-year-old junior high school body. As she navigates each day, memories long buried begin to resurface. She now recalls being entangled with her older sister, whom she admires deeply, and her sister's first love, a senior at her school.