ROE-542 Days of incest with mother in the family home after all children have left the nest—Nagamine Tsubaki.

Kenji was born as the second son of three brothers. To his mother, Tsuba, he seemed like a child who didn't need much attention... One spring, his older brother got a job and started living alone, while his younger brother enrolled in a boarding school. His father went on a business trip alone, and life became hectic. Kenji and Tsuba began living together as just the two of them. The once lively home suddenly fell silent, and Tsuba felt a sense of loss… Seeing his mother like this, Kenji felt resentment and emptiness towards his siblings' attention, trying to monopolize his mother's affection.