"You are going on a date with Yuusei? Expect to get something put in your butt." -Hamuchiro's book of wisdom
In spite of that joke, there was a lot of feels in this chapter. Yuusei does not relate to kids his age. He barely considers the time he spent with Hiyori, and he's totally bored on his date with Sakurai. Perhaps he spent his childhood fixated on Sumire, and thinking about becoming her promoter, cause he def didn't spend that time thinking about normal kid stuff. Sad! Or maybe Sumire is so fun to be around that regular kid stuff just doesn't do it anymore. Freaky!