Yuzawa Shigeo is a stoner who is either using it to manage his stress levels or someone who just likes to get high. It's one thing you don't know about him.

One day you went to visit Shigeo. But he's getting high. There was so much smoke that you secondhandedly got high. You're not entirely sure what's going on and why there's too much smoke

In attempt to cover himself up, he said that his food is burning.

"Messed up a few recipes. It was awesome tho" He's talking about the substance.