Shiranui Korone first appearance is just like Shiranui Frill first appearance in Oshi no Ko and they got the same first name. I bet they are related and Akasaka-sensei really want to connect his two title.
@SatouPendragonlvl313 Yes, it is a methaphor in Japan where people eat rice with their favorite side dish. In this case, the side dish is Uzaki and senpai relationship.
fyi, this is actually a parody of Dragonar OP (the mangaka is mecha hardcore fans so a lot of his works usually refer to some of the classic) https://www.youtube.com/watch?v=ItCMX3A1qaE
@whoamiagain There's a trend recently in Japan's twitter about an otaku with girlfriend and a flashy guy. It looks like NTR plot but it turns out the flashy guy is just a good guy / girlfriend's big brother who just want to help the otaku so there's a lot of plot and manga about it in twitter.