PTS-557 Won prize money and meant to repay their parents, but it turns into a Twister game for a close sister and brother! An innocent wardrobe slip and close contact send the younger brother into a wild frenzy!

Urgent investigation! A surprise street interview with a sibling pair!

Would you like to join a prize-based Twister game to test how close the two of you are?

The prize is an incredible 1 million yen!

However, with each failure, the prize money is cut in half and an additional penalty challenge is added.

What starts as a lighthearted game gradually becomes more difficult.

Their bodies draw close, and the older sister’s private side is exposed…

For the younger brother, who has no experience with romance, one intense situation after another unfolds.

A forbidden sibling Twister challenge.

The brother’s self-control spirals out of control, and the sister is caught up in the moment as well.

Before long, it leads to the brother’s first sexual experience.

A series of unexpected mishaps even leads to an accidental climax.

In this provocative game of prize money and penalty challenges, what will happen to the bond between the siblings!?