This chapter is a lot of fun and proves that Sabu is keenly aware of the fandom's impressions. She really is a master troll.
Still, I'm baffled at all of you saying Mei and Yuzu's relationship hasn't advanced at all, like, do all of you only count progress if they are having sex? Unlike citrus where Yuzu was the one moving heaven and hell to support Mei and Mei failed to reciprocate, citrus plus is all about Mei acknowledging her shortcomings and working her ass off to support Yuzu as much as she can. She's still a sheltered dumbass that takes things very literally but she's making progress and slowly understanding how to better express her own feelings towards Yuzu.
Oh and the extra leaflet will be a treat for HaruMatsu fans