I'm a college student who's currently staying with my brother and his wife while I'm attending a prep school in Tokyo. My sister-in-law keeps sneaking around my brother's eyes and seducing me by showing me her braless outfit, which keeps me from concentrating. One day, with a worried look on her face, she tells me she has something to ask me for advice, and when I listen... I'm tempted by my brother's wife, who is a bra-cancelling girl... I...