The nightmares begin with the appearance of senior Higashi, who lives in peace but has moved to the same company housing. - Higashi who invades Saho's house after her husband's arrival and forcibly pushes Saho. - After that, Saho drowns in sexual play with his distorted desires. - Higashi who plays with Saho's body as much as she thinks her husband will go on a business trip. - Saho who gradually seeks herself and is absorbed in intense sex.