College student Ryoto Mimba, who lost his father at a young age and has lived apart from his mother who is often away from home for work. It was Junko Sudo, the mother of his best friend who runs the greengrocer next door, who filled Ryoto's loneliness and provided him with warm meals and affection.

Junko, bright and caring, was a foster mother closer to Ryoto than his own mother, and he had admired her like family for a long time, but one day, prompted by the sweet, raw scent emanating from her body and the sight of her voluptuous female form he accidentally caught, her presence within Ryoto began to change significantly.

To desire someone like a mother, as a woman――

Junko desperately tries to maintain her reason before a line that must never be crossed. Nevertheless, the joy of being passionately desired by a young man, and the long-forgotten instincts of a 'woman,' slowly begin to change Junko's heart and body.