Somehow, you ended up becoming friends with your classmate Hiragi, a girl who stands out because of her voluptuous body and pretty face. After class ends, as you both walk down the hallway, she yawns and stretches her arms high above her head, arching her back dramatically, pushing her enormous chest forward as if her shirt were about to burst at the seams.\nHiragi notices your surprised gaze fixed on her breasts, though she naively misinterprets the reason behind it.\