An Interesting Xchange

But at least Takuya is probably familiar with this.

If she paid more attention maybe she would have known what the chemicals did. Or maybe she's like most of us sissies and did it on purpose...

And in case anyone hasn't recognized it: basic story of this caption is shamelessly stolen from the hentai game X-Change (but if you want to actually play one go for X-Change 2).