How My Big Sister Became That Brat Next Door's Sex Toy.

"Damn it! That's my sister you... you...!!"
"No... Takumi's d*ck... compared to Masao-kun it's so small..."

Older sister: Yuko Imai
Younger brother: Takumi Imai
Neighbor brat: Masao Shida

Yuko injured Masao's hand while the three were playing together.
Until his hand could heal, she took care of him.
It was all going to Masao's plan.
The brat next door had designs on Yuko. He made her do things.
Out of guilt and then by blackmail, she let him have his way.
One day the cat got out of the bag. Takumi saw them.
Being violated in front of her little brother was too much for Yuko.
The last straw was when Masao passed her along to a friend.

25 base CGs!
Over 230 total incl. story with fluids & facial variations!