Again, it's arguably not entirely inconsistent with Mei's character for her to have become Miss Pre-Nuptial Purity Queen, but to me it's not particularly satisfactory either, not because I just want to see them get it on, but because it inevitably leads to more scenes of Mei fending off Yuzu (physically and emotionally) even though the two of them are now supposed to be closer than ever before.
I think this time around, Mei wants to reward Yuzu’s feelings emotionally.
What bound them the first time around was physical. The connection turned emotional but Mei had trouble expressing herself. This time, Mei wants to give Yuzu something she couldn’t before: consideration, honesty, perhaps an open line of communication and time.
Also, Mei probably feels guilty that she hurt Yuzu and now wants to show and prove that she loves Yuzu in other ways beside the obvious physical demonstrations.
And of course, maybe Mei’s trying to gauge how much Yuzu’s changed in the months they’ve been apart. It’s clear that she’s expecting Yuzu to be different somehow and she’s right. As Harumi and Matsuri have proven, Yuzu’s also still trying to prove her devotion to Mei by becoming a better partner, her version of someone who will be worthy to stand beside Mei.
Over all, I think Mei wants to improve their relationship by strengthening their emotional connection before diving into more carnal aspects of things.
In Yuzu’s case, she’s just happy to have Mei back so she’s not focusing on sex just yet. She seems to be enjoying the freedom of everyone knowing and is content with this development. I don’t think she’ll be asking for more any time soon, especially since she’s trying to get into the same university as Mei.
Though the college thing has me thinking once she gets accepted, the university isn’t the only place of Mei’s that Yuzu will be getting into.