"Alright, let's go energetically today too! It's Banchou Onee-san!" Former delinquent idol Takumi Mukai. Her trademark bōsōzoku jacket appearance was hugely popular on the children's program "Let's Play with Yankee Onee-san!" Takumi, who combined real intensity with kindness, was the children's hero. However, that popularity twists her fate.
One day, the son of a major industry executive watching the program begs his father, "I want to meet her!" The obese executive summons Takumi through her agency and speaks with a smirking face. "My son has taken a liking to you. So... you understand, right?" Refusing means being blacklisted from the entertainment industry. Takumi grits her teeth and can only nod.
In a luxury hotel room, Takumi is pushed down on the bed while still wearing her bōsōzoku jacket. "I'll do it with you in that outfit." The fat man's hands grope her breasts through gaps in her clothing and flip up her skirt. "You bastard...!" Her words of resistance are futile as a huge meat rod pierces inside her. Her pride as a boss is painted over with pleasure and humiliation.
Several weeks later, Takumi is summoned to the executive's home. "From today, you're our maid." What is handed over is a cow-print bikini, cat ears, and a collar. As the boy she saw through the TV screen appears before Takumi, who changed clothes with her face twisted in humiliation. "Wow, it's the real Banchou Onee-san! But... your clothes are weird." The boy's innocent smile and behind him, his obese father's vulgar laugh. Takumi is forced to meow "meow♥" on all fours.
The boss who once didn't fawn over anyone has now become a "pet" kept in a powerful person's home...