爱情的实体到底是欲望？还是是牺牲？谴责爱情的红字是欲望的代价，还是牺牲的象征？影片爱的烙印中尚姬为了收集和研究x愛，混入一秘密的性狂热协会，期间她亲身实践，发现性狂热者与一般人无不同，而自己也因此要卖掉爱车，进人另一种生活之中！
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