It's impossible to twist my arms the way Aya does.
btw I couldn't find any tags (other than make-up), so I made some.

These looks like Umetsu Yasuomi's artworks. I'm not sure though.

S1eth said:
It's impossible to twist my arms the way Aya does.

Of course it is. I've done it many times.

Possible, difficult if you aren't flexible.

Is this a parody of "High School Girls"?

wow, the last image scares me