"I'm going to be a bad girl..."
The main character, Hina, suffers from the curse of her mother's upbringing since she was a child. One day on her way to home from her work's place, she heads for the nightlife district.

"I want to go out at night, I want to be a bad girl..."

While drinking sake bought at a convenience store on the street, she is approached by a stranger.
"What are you doing here all by yourself?"
The man, who calls himself Daiki, says he is a rookie pro-wrestler.
The two of them drink sake together and have a lively conversation.

"Are you going home already?" Daiki asks me.
"I don't want to go home... yet..." Hina tells him.
"I see, let's go have another drink."
Then Daiki takes Hina to his house.

"It's not my place, I'm in a dormitory"
Then whose house is this?
Hina and Daiki get drunk and start having sex.

"Kurokawa, you brought a girl into my house again, didn't you?
In the middle of Hina and Kurokawa's act, a voice echoes
"Brother Yan!"
The identity of the man Kurokawa calls "Yan" is...
What is the fate of Hina who just wanted to be a "little bad girl"??