Kaori's Manga

It's nothing new but still interesting. Although, I have to say the story feels rushed and there are already so many plot holes. Like, no one questions anything. The MC doesn't even question how and foremost why he regressed, nor does anyone seem to question why the MC is suddenly a total different person. He basically defeated the Orc's almost on his own, and killed 5 guys to protect his sister and no one is like; Huh, strange. Like, wtf? Why do you guys just accept it as if it was nothing special and totally normal???