発展途上の乙女の悩み…。大人の女性に憧れ、自分の胸にコンプレックスを持っている女子第4弾！母の許しを得てエステに行けることになった『いく』は、恥ずかしがりながらも施術を受けていく！おっぱいのサイズを測るために触ったり、乳首を弄ったりされているうちに気持ち良くなってしまういくはエステに虜になってしまう！エステに通う度に弄られ超敏感になってしまう乳首の刺激にエビ反り絶頂！自ら延長を希望するいくは目の前に出されたチ●ポを咥えるほど発情！マ●コに挿入も許すと乳首との同時責めで絶頂！自宅にまでマッサージ師を招き入れると特別マッサージの中出しセックスでイキまくり！

The troubles of a developing young girl… The fourth installment of a story about a girl who longs to be a grown woman and has a complex about her breasts! Iku, who has finally gotten her mother's permission to go to a beauty salon, goes through the treatments shyly! As the masseuse touches her breasts to measure their size and plays with her nipples, Iku starts to feel good and becomes addicted to the beauty salon! With each visit, the stimulation of her nipples, which have become super sensitive, makes her arch her back in ecstasy! Iku herself asks for an extension and becomes so aroused that she takes the dick that is placed in front of her into her mouth! She also allows insertion into her pussy and reaches climax from the simultaneous stimulation of her nipples and pussy! She even invites the masseuse to her home and climaxes repeatedly during a special massage and unprotected sex!