Y/N has always been close to Kusuo Saiki, their quiet, dependable childhood best friend—unaware of just how much he’s always been watching over them. But high school brings chaos, especially when Riki Nendou develops loud, genuine feelings for Y/N. While Nendou is open and straightforward, Saiki stays silent—denying his own growing jealousy even as he subtly interferes to keep Y/N close. What starts as small, controlled actions slowly becomes harder to hide, especially when Y/N begins noticing. Now, caught between honesty and avoidance, Saiki is running out of ways to pretend he doesn’t care—and Y/N is getting closer to the truth.