[[From here.]]

[Even on the off chance it is innocent, breath that close to his skin certainly isn't helping matters, and he musses Yuki's hair a little petulantly in response.]

Innocent people don't make the place they're resting their head all hot and bothered...you can fool other people, but not Momo-chan...

[Momo knows his crimes too well by now to let him pretend innocent about anything to do with anyone's chest.]