Manpuku is a student's godsend.
It's across the street if you come from OCAD, and a 15 min. walk from UofT. You're welcomed by a cozy, family restaurant environment and chill music in the background (it was Nujabes for a bit).
The food is filling and you can get neat little appetizers for as little as $2 apiece. This makes the menu very customizable. One of my favourites is the niku udon, which always has a good amount of beef, a rich soup base, and authentic-tasting noodles. I usually pair these noodles with a salad + takosen combo for a little extra $.
Manpuku is a welcome change from the sushi/ramen variety common in Toronto, aiming instead for Japanese "comfort food"--the kind that's served in fast food joints across Japan. (Don't confuse Japanese fast food with the American kind, though--the former still feels relatively home-cooked, at least to a foreigner like me.) Like others have said, it's food "made with love."
Service is friendly and speedy. Best of all, Manpuku comforts the wallet too--prices are a steal for relatively authentic food.