He's this OP. He even said that he had killed multiple Gods in his OG world. I found it hard to believe that some girl managed to kill him.
Unless he was intentionally trying to die like the guy in Majutsu Guild Sousui.
Something bad definitely happened back at school. And MC doesn't know what happened. For her family to suddenly move, it might be something serious. Like bullying or rape.
I don't get it. The masters are human right? They have gifts and all, which is something unique to human. Yet they're casually sacrificing human as well?
Thr masters being at Lv.5000 is weird as well. Even MC was stuck at Lv.4000 and has to resort to summoning otherworldly monsters with levels...
Dayum. I feel like this is the first time i've read manga with bullying theme, where there are people actually legit trying to help MC. It feels weird.
This reminds me, there's a couple of events before where Mina in adult/spirit form interacts with MC. I wonder if that's a hint to her connection with the saint. Maybe she's the real saint, drugged and became a child. Like Conan Edogawa.