Tsubasa visits her father-in-law, who is a middle-aged divorcee living a lonely life. Tsubasa sees her late father in him, who lives a self-indulgent life drowning in alcohol, and offers to take care of him. However, her father-in-law is attracted to Tsubasa's voluptuous body, which is sometimes exposed, and he forcibly attacks Tsubasa! Tsubasa is confused, but gradually her father-in-law's intimate acts draw out her sexual desires...