@Zen_Clark I mean I guess but assuming no shady business going on minimum wage is 9 dollars an hour. 16 hours a day and working 6 days a week (assuming 6 because he only has the 1 day off), Kenta's making 3456$ a month before tax. And googling cost of living shows it to be 1500$ a month in Kyoto. So the short answer is "it's a manga" but in reality he should have tons of savings assuming he isn't sending it back to his family solely based on the fact he literally has no time for any hobby or even to go spend his money.