Breasts Are My Favorite Things in the World!, Vol. 5 — Wakame Konbu

As Chiaki's interest in Hana grows beyond her bountiful chest, their relationship attracts the attention of Akira, Chiaki's cousin and mentor in all things bosomrelated. But while Akira professes to be a true boobmaster, her dirty secret is that she's a breast virgin who's never touched a pair other than her own! As she desperately seeks to discover how her student managed what she could not, Chiaki tries to keep her rival aficionado from coming into contact with Hana!