C900 A Prank

"Alright, alright." There were only the two of them left in the huge laboratory. Ji Xiu put his arm around her waist and said, "Don't be angry. Don't lower yourself to the level of a child. Her menstruation period should be messed up."

"How did you know?" Xiao Yin's heart was beating fast.

"I smelled something wrong with the content of the female hormones and the hormones..