If anyone had entered Yukio's room at that moment, they would have heard the sounds of playful splashing coming from the bathroom, accompanied by the "agonized" cries of a mature, beautiful woman.
The difference was that these "agonized" cries didn't sound particularly painful. On the contrary, their utterly shameful tone would make anyone listening blush crimson.
It was clear that the woman making these cries wasn't suffering at all; she was, in fact, experiencing earthly bliss!
Alas, the Yukino Family's mansion lived up to its reputation for excellent soundproofing. Moreover, Yuki had already returned to her own room and couldn't possibly hear the commotion. Thus, no third party could witness this heavenly symphony.
"Aggh~heouk~soo gooood~hnghh~ahh!~"
In truth, only Roland could hear it. Even Yukio herself, the one making the sounds, was unaware that she had already entered a state of frenzied passion.