After Golden Week, I gradually withdrew from class, unable to fit in. The desire to avoid everyone grew stronger. During this time, my childhood friend "Hana" started visiting me daily. We've known each other since kindergarten—she's bright, energetic, and popular, the complete opposite of who I am now. As the first semester ends and graduation ceremony arrives, my classmates prepare for summer break tomorrow. It feels irrelevant to me, locked away as I am. Then, "Hana" invites me to a fireworks festival.