I'm really hating this. So Slow, Japanese isekai protagonist, chooses NOW to tell Cephas that his mother is alive? Not like before? During any time BEFORE Cephas started killing people? The ONLY downside is that Cephas' mother's wishes of being thought dead wouldn't be honored. The upside is preventing a KNOWN rebellion that would kill innocent people. Slow, Japanese isekai protagonist, has absolute knowledge of the future.
This was just stupid.