At 41, Aika has been married for 18 years and has two children. Her mind and body have drifted apart, leaving her unsure which is her true self. Raised in a dual-income household, she ran around with her older brother and male friends, growing up wild and free-spirited. The tomboyish girl threw herself into part-time work upon entering junior college, where she also experienced her first love. She met her husband, four years her senior, after finishing junior college and starting her career, marrying just one year after beginning their relationship. Currently, due to her husband's job, she lives on a remote island in Kagoshima, while maintaining a double life commuting to her family home in Tokyo to care for her aging mother. Burdened by complicated circumstances, she now stands at a crossroads in life and embarks on a journey to reflect on her past.