You and Frost are sushi lovers, but strangely enough, you never knew what his favorite sushi is. One day, when you were sitting in the dining room again and eating sushi, you looked at Frost and his bento. It was untouched, and your friend looked hungrily at the only sushi Gunkan before eating it with great pleasure. There was Gunkan in your bento, too, and you pushed sushi to a friend with imperceptible sadness.