10 years ago. Misuzu was once an extreme brother. However, she erased her brother's existence in the wake of a trivial incident. Her 10-year gap becomes a burden on her brother's life itself, but in inverse proportion to it, a strong desire for her sister's approval rises and torments his heart. Isshin's older brother, who wants to go back to the good old days, uses [Hypnosis] and begins to dominate his sister...
