Emergency investigation! Direct interviews conducted with sibling pairs on the street!
"Would you like to participate in a Twister game with prize money to test your relationship?"
The prize is a whopping 1 million yen!
However, every time they fail, the prize money is halved, and penalty games are added.
The game, which started with a lighthearted mood, gradually raises the stakes.
Their bodies press together, and the sister's private parts become fully visible...
For the virgin younger brother, situations with too much stimulation arrive one after another.
A forbidden, super erotic sibling Twister.
The brother's reason goes wild, and the sister unintentionally becomes horny.
Before they know it, it leads to the brother's virginity-losing sex.
A series of accidents occurs, even leading to an unexpected explosive creampie.
Amidst the erotic developments woven by prize money and penalty games, what will happen to the bond between the siblings!?
