My girlfriend Yuka's friend, 'Mia,' a current gravure idol, was also my friend, but we had been attracted to each other for a long time. During the three days when my girlfriend was away on a trip, my feelings and Mia's feelings, which we had been suppressing, were released, and we ended up together... A forbidden relationship for three days until my girlfriend returned... Absolutely not allowed to touch... But, a super-huge-breasted gravure idol is attractive, isn't it... A chest-numbing image that lost reason and devoured... .