Yamato/Hibino and Yuiji/Mayu

I looked at chapter 20 again, and how Yamato interacted with Hibino reminded me so much of how Yuiji interacted with Mayu when they were dating. I feel there are so many parallels between the two. the low-energy vibe, the feeling as if it's half-assed, their minds being elsewhere, and the feeling of obligation to do something rather than genuinely wanting to do it for their own enjoyment.