柚子と芽衣

Mei is wearing the costume of Pucci from Jojo and Yuzu is in that of Implacable from Azur Lane.

I actually found there are some similarities between Mei and Pucci, like they are homosexual, admiring their idols, with something to inherit, defeated by kids (Matsuri and Emporio respectively), having explicit signs when feeling nervous (ears turning red for Mei and counting prime numbers for Pucci). For Yuzu's outfit, I just thought a horny would be suitable for a cool girl dressing like a priest.

Mei is trying to purify Yuzu's sins and they are intending to attain to heaven together. They are married couples, of course they have to share such golden experience.