They are interrupted

However before they could get any further a loud sound of echoing footsteps was heard from outside that stunned them and disrupted their momentum. Hajime quickly moved his hand over Mikan's mouth. Quieting her moans as the footsteps drew nearer before a voice rang out in the echoing bath hall.

"YELLLO, IS ANYBODY IN HERE. IBUKI FOUND A LOST TOWEL IN A CRAZY POSITION AND WAS LOOKING TO RETURN IT." Ibuki's loud boisterous voice crashed through the room. The two of them were left stunned not wanting to be caught in the middle as they both quieted down. Mikan desperately trying to muffle her moans, despite Hajime continuing to slam into her pelvis at irregular intervals. He seemed to take some slight delight in having her squirm at not being detected.

The continued to hear her voice and footsteps vibrating through the area for a while after. Their excitement at the risk of being caught growing as their bodies heated up. Their blood pumping when they heard the sound of her looking around a mere 20ft from where they were going at it. Mikan nearly letting out a gasping moan as Hajime hit her sweet spot before biting her lips to keep quiet.

Thankfully it didn't seem like she approached the changing room they were hidden in before she departed. They both let themselves calm down a bit as they heard her wandering off to look elsewhere.