The 17th Erokyun entry is a first-person sex documentary in which four beautiful amateurs reveal their hidden desires, this time devoted entirely to naturally busty women. Nacchan, 20, is an anime fan with self-described G-cup breasts who has never masturbated or drunk alcohol and is introduced to the pleasure of sex. Osaka-chan, 20, lost weight through daily running but miraculously kept her natural I-cup chest; shy, submissive, and easily persuaded, she grows visibly wet as embarrassment turns to pleasure. Ri-chan, 24, has not been touched for a year, leaving her H-cup breasts extremely sensitive; the lightest touch makes her juices overflow, and sex after such a long break has her screaming and nearly passing out. Hikarin, 24, is a cheerful, carefree, idol-level beauty with gorgeous large breasts and an exceptionally sensitive body. Their wildly bouncing tits make a single load nowhere near enough.