C70 Bathtub or Something

"I'm back!" Xiao Yun looked at Jian Bai with disdain. He had never seen such a simple mechanism before? If someone had told Xiao Yun about it before today, he wouldn't have believed it, but the truth was right in front of him.

What should he do if he felt embarrassed? Jian Bai's heart was in a panic, but on the surface, he still kept his mouth shut