I already despise Kim, hope he realises why this guy is so obsessed with marks at some point. Also he is probably failing because of the stress of being scared of his dad hitting him, so he works really hard doesn't relaxes end up getting bad grades then gets beaten by his dad. It a depressing cycle and he is probably being traumatised by it, and the worse part he doesn't realise it. Someone pls give him a hug ;;