Pitiful dude. He moved out to live alone but doesn't bother to learn to make any food.
In my native language there's a specific term for (modern) people who can't take care of themselves. These people could still have the skills to use computers and smartphones, and such things, but they can't cook, do their laundry, maintain their apartment, or any such things that are needed to keep going from day to day without external help. They need to rely on restaurants or ready-made meals from grocery stores to keep themselves fed. Literally translated into English, the term would be "neo-helpless", as it refers to the fact people in the past lived in a less convenient and pampering environment and thus learned more of the basic day-to-day skills.
But then again, I suppose none of that would apply to Japan, anyway, because the whole "cooking is as difficult as rocket science" thing is extremely prevalent in manga, meaning a good portion of mangaka couldn't cook their own food even if their life depended on it. So, it's apparently perfectly honourable and normal in Japan not to know how to do anything in the kitchen, apart from accessing the fridge.