The silence that followed Rin's question felt deafening. Waiting for the system to tell him the alternative weighed heavily on his mind, to the point where he felt as if he were waiting for an extremely important verdict.
Finally, the system gave him the answer he needed.
[An alternate route has been discovered. The reason a calamity occurs is because a human develops a core that mutates them. Removing the core before the corruption level reaches its maximum can save Serena.]
Rin recalled the incident with Alex and how he had gained a core after Alex died. So that core had been the reason Alex mutated in the first place.
But if that was the case, then…
"Wouldn't it have been possible for me to save Alex as well by removing the core? Why didn't you suggest this method before?"
Rin felt angry at the system's two-faced nature.
