• First part
  The mother of a friend next door winds up making lunch for a boy. His heart is stolen by the sight of her standing in the kitchen with her back turned to him, and his hands reach out to her...

• Middle part
  Ever since that day he assaulted her, the boy comes over frequently, seeking her body. Even while feeling guilty for her husband who got assigned to work away from his family, Momoko lets him have his way with her body. And then, even her heart gradually becomes the boy's property...

• Last part
  Her son is perplexed over how his mother has changed, because now she treats him bluntly. This has been the case ever since his friend next door started coming over frequently; Wanting to know what kind of conversations his mother and his friend have been having, he goes to take a peek and what he sees right there is...

(Source: DLsite)