Nagi Mamiya, the daughter of a noble family, runs away from home to escape her family's political marriage that is being forced upon her after her father's death. However, with no one else to turn to, she has nowhere to go and visits her old teacher's house... A lonely young girl who can't ask anyone for help, eventually loses her mind due to being imprisoned like hell and lesbian training... A story of two isolated women with emotional scars... a story of the imprisonment of a closeted lesbian.
