Shota x Support

My parents are on vacation and it's just me and my big sister.
She says she wants something.
And to earn money, she wants me to play with her friends.
Of course I like to play with them, so I say yes.
I don't know how it works, but we can get a lot of money just by playing with her friends.
She said it is called "support".

After a while, my sister's friend came to my house.
She started to look at me.
I felt strange.

Then she started to touch my body!
I didn't like it, but my sister held me down, and they started to naughty things!
And then, another friend came. One and another!

I've never played anything like this before!