At 35 years old, Yamaguchi Narumi was single and moved by her aunt's pitiful death. Her aunt, a diligent professional who never tied the knot, had passed away without any companionship. Narumi resolved to prioritize her own readiness for a comparable destiny, opting out of the search for a partner. She believed living a solitary life was the ideal method to evade burdening others and pass away honorably.