I'm thinking of a manga where the main character is a male office worker of some sort. He's seen as perfect but doesn't have much of a passion, in fact he seems indifferent. He tries to get a hobby and starts getting magic lessons from an old man in a crafts shop, but when the old man disappears he gets knitting lessons instead from the old man's granddaughter. There's also this part where he feels disgusted or something over how thin his classmate/senpai(?) from highschool is.

Thankyouthankyouthankyouthankyouthankyou! 8D