can't remember the name

it is a action/fantasy manhwa, as far as i remember, he is a male and a kid, he has a sister and they're in the car going towards to his grandma(?) and there is a bridge. the mc is anxious cause there is a monster that's gonna appear there? when they're in the bridge, a kraken or octopus appeared. and the mc fight it with scissor? if im not mistaken. this is the only scene i remember, pls help me