"Back?"
Kallen greeted her. The mountain gate had already been fully repaired. Mayer truly deserved her reputation as a mechanic from Rhine Lab—her robots were among the very best. Once the repairs were complete, it looked almost no different from before.
But it was by no means exactly the same. Subtle differences had been hidden within.
The mountain gate now opened and closed more smoothly. Mayer had used a new transmission structure, making the doors quieter. The hot spring had also been fitted with an entirely new heating method, allowing it to warm up faster, along with a water circulation system that removed the need for manual water changes. The cash box had gained an automatic collection mechanism too; once it was full, it would collect the money automatically, so no one needed to keep watch over it...
All of that was written in the manual. As long as one followed the instructions, they could complete everything step by step. It was practically the perfect example of something even an idiot could learn. But after Hoshino finished reading the manual, she still couldn't find Mayer herself. Building a place like this apparently hadn't made her happy.
"Probably because she never found a chance to plant bombs?"
While waiting for the water to heat up, Hoshino asked the AI for a detailed report. The AI's report was somewhat obscure, but Hoshino understood as soon as she heard it. Kallen had been watching Mayer the entire time she worked, and Mayer, guilty as she was, hadn't dared take out any bombs.
"Then if she'd tried to plant one, would you have stopped her?"
Kallen shook her head.
In truth, the AI's processing power couldn't distinguish what a bomb looked like at all. But they could recognize hostile actions. If Mayer had truly