Yes her mom has a protective complex so this boy can't get out much; but honestly looking at those wages per hour this dude is better if he had a part-time job of 840 JPY per hour for a sum of 4200 JPY instead of 500 JPY filling gacha toys, like 8 times more money; in a month he'd get enough money to help her mother and extras like books, furniture and magazines, hell even he'd get money to invest on educational courses and get a better job.
But yes, let's not forget that's a "If", because her mother protects him so much. And Souta wants to meet with Haru again.