@PantsuKami ahh i see. Still though, im not necessarily happy when I see someone physically harming others as a way to release anger.. oh well, ig these characters don't actually exist, so its fine
For those who confused, he's jealous. In china, being jealous synonyms for being 'sour'. so when the black hair guy bought him lemonade (sour), he feels like he is being mocked by him which is why he hits him haha.
Still love the hindsight joke where him hitting his friend is because that girl is his friend's sister who openly flirt with her boyfriend,so extra grudge