Tsubasa Miyake stands as one of three central characters confronting the trials of school life, academic demands, and evolving friendships. He acts as the mutual friend bridging Takuya Amano and Haruka Kishi within their circle. As a student at Eikoh Seminar, an institution dedicated to academic preparation, Tsubasa supports both Takuya—who anticipates relocating to Hokkaido after middle school—and Haruka, Takuya's childhood friend, as they grapple with impending separation and study pressures. The narrative situates him within contexts highlighting the dynamics of examination preparation and the bonds of adolescent friendship.