What's weird is: - why did Miichan leaves without Yuki, she should've know how media will reacts, and the fact that they're from the same team is more weird. If she leaves, then why she leaves Yuki behind? No matter the reason, leaving their nakama alone is weird. - if the location and time was their idea, then why did Ogiwara and Sugimoto is getting warned, if this is their plan, what they do is too sporadic, hence why i think that those two are not the one who decide the place and time. - if Yukirin planned to do something that were questionable by public, she lacks preparation to hide her identity and follow-up plan. - in the photo, except for Miichan's outfit, everyone wasn't too bothered with covering their identity, even an AV actress. - lacks of their entry photo and the order of who comes in first. We only see the result of this event, not it's initiation and purposes. Spoiler I hate to accuse anyone and it pains my heart in doing so, but unfortunately, until proven false, it seems that this party is most likely planned by Miichan.