[Touya rolls his eyes slightly. Yes, not an issue. Suddenly turning into another person wasn't an issue at all. Bringing someone Touya doesn't know into their space in the middle of the night when he was sleeping and couldn't even agree, wasn't an issue. Gosh Yue, Touya loves you, but sometimes...]

Yukito is Yue's other self, but they both hear everything the other does. Most of the time. So Yukito knows who you are too.

[Which means yes, he's the only one out of the loop.]