Chapter 523: Mutation, Alchemical Advancement

What's going on? A quarter of an hour later, watching Katsumi Barlow, who had just a slight blush but clear eyes, Osamu was completely stunned. How could Katsumi hold out for so long? Despite Osamu's amazement, he didn't notice Katsumi's rising anxiety. "Hurry up and think of something, little ball!" Katsumi anxiously shouted to the little sphere in his mind. However, the little sphere in the source world space remained calm. "What can I do? Perhaps you should just give in to her. From what I...