Heating up Sushi in a Microwave

I had a dream.

In this dream;

I'm a student living in a dormitory of a university with a Western roommate.

He brought a pack of Sushi for his dinner. He asked me if he could my microwave. I felt strange and asked him, "Well, what are you doing with the microwave?"

He replied, "I must heat up the sushi."

I was surprised and said, "Heh, what are you doing?"

He said again, "I'll heat sushi."

"Well, why will you heat the suchi?"

"'Cause I don't eat raw fish and heated sushi tastes good. Haven't you tried it?"

"Hmm, does it really taste good? I've seen someone heat onigiri in a convenience store, but..."

"Yeah, heated sushi tastes as good as heated onigiri."

I like to challenge bizarres foods.

I said to him, "Can I try a piece of the sushi?"

He said, "Sure."

And then I ate heated tuna sushi. Vinegar evaporated and the heated sushi smelled too sour to eat.