[Kumaashi S] Honmono (COMIC ExE 42) [BSN]

A bespectacled librarian with an enormous, gravity-defying bust catches a young boy sneaking a peek at a porn book among her shelves and offers him the real thing instead, smothering his flustered face between her soft breasts with a teasing 'good boy.' What begins as playful teasing escalates into a full encounter right there in the library, the inexperienced virgin losing himself to her skilled mouth and body as she milks him dry. Three days later he returns with a toy ring and a breathless marriage proposal, leaving the busty onee-san utterly stunned.