He makes Yae a "Good Girl."

In his tent, after the party had eaten and were getting ready for bed, Touya had the Note out of his bag, and was considering what to write about Yae. 'She does seem a bit naive and carefree, but easily embarrassed,' he thought. 'I think I'll play into that...'

With that thought, he wrote, "Kokonoe Yae will find Mochizuki Touya to be very attractive, and find herself wanting to be a "Good Girl" for him. This will lead to her doing anything Touya asks of her gladly, desiring nothing more than to please him. Her inhibitions will remain, but not prevent her from going through with obliging whatever he wants. Linze Silhoueska and Elize Silhoueska will find nothing odd about Yae and Touya's activities under these parameters."

Satisfied, Touya closed the Note, and walked up to the other tents. Luckily, Elize and Linze had packed a spare one, so Yae was covered. He had one to himself, and the twins shared another. Would have been slightly awkward to have either a boy sleeping in the same tent as a girl, or three people in one tent and one person in the other. Then again, Touya could have solved the awkwardness of the first option with the Note.

"Hey Yae, you still up?" he asked from outside it.

"Yeah, I'm still up!" Yae called out to him.

"Mind if I come in?" he asked.

"Oh, sure, go ahead!" she replied, and with a smile, he stepped into her tent.