Just as my student days were drawing to a close—a time filled with aimless uncertainty—I had a dramatic reunion with Ayane, an older woman who had looked after me in various ways since childhood. To my surprise, she possessed a pair of massive breasts unlike anything I’d ever seen before! "Naoto-kun, do you like my boobs that much?" It looked like I was about to become her lover and get to fondle and suck on those huge breasts to my heart's content! But then, my childhood friend Chika barged in—and she was packing a pair of massive breasts that rivaled Ayane's! "Chika's boobs belong only to you, Senpai!" Would it be the mature, older-sister type, Ayane? Or the younger-sister type, Chika?! Caught between two pairs of massive breasts, I was torn! My "Oppai Life"—a daily routine of fondling and sucking from morning till night—had officially begun!