Carefree and seriously horny, Rino complains to a male friend that her boyfriend will not have sex with her. He suggests that her huge breasts or her technique might be the problem, and somehow they end up testing her tongue skills. She is shy at first but passes with flying colors. Her frustration remains, so a later complaint leads to another hands-on test. Rino offers only token protests that it is pointless and would count as cheating, then happily lets him strip, fondle, lick, and suck her while they trade oral attention. Their playful back-and-forth makes the whole encounter even more fun.