Spoiler!
(2) so he quickly goes to a different direction hoping to find a village and get away from those monsters and when he was losing hope he sees a fire from a bonfire from a mile and he quickly goes there but he got disappointed more like enraged because it's a village of goblins (he annihilate that village to ease his anger) after a while that's where he encounter those nobles he help them fight off those bandits with his all powerful magic and sword skill and in that carriage that's where he fix that girls book which render her unable to cast magic, she repeatedly practice that fire kinda magic until they encounter a giant bear which the mc said to the girl defeat that with your magic and so on and so forth and as they are eating in the wild of course the former duke that old man ask the mc what his level are and he ask whether he is level 500 but the mc said maybe around 3 times more of that and they are shock of course, the former duke invite him to stay at their territory cause it's gonna be an opportunity for them to have a great mage in their territory so basically they go there and that stuff happens the bathroom seen but the difference is that the mc is the first to bath and the girl is the one who goes in there so she's the one who sees the body of the mc. So basically that why is it different? Its impossible that this is a different manga cause the following chapter are correct