The amazing part of this manga is there's always someone or something that connecting the current chapter with previous chapter. The old man in white shirt is the one who notice the sticker on Mai's (college girl) back. And the sticker was picked and plasted by Ichita (the boy who jealous with his baby sister), and so on. See if you can found more connection along all previous chapters xD
I love how this series makes a point to showcase all sorts of different relationship. A sports rivalry seems more typical boys' stuff but here it's about two girls. It's just nice.
The two at the end were so regal compared to the mostly cute cast that they took me out, lmao.