Viewfinder is without a doubt one of the most erotic and captivating stories I've ever read. The art is gorgeous and the sex scenes are so hot you could swear your nose is bleeding while reading it (At least, that's how I feel when reading it!). A trigger warning for those who feel uncomfortable reading about rape. There are more than a few rape scenes in the series. Besides the rape and violence, the story is captivating, exciting and (somewhat) romantic. I'd recommend this, but only to those who are 18 years or older. This manga is quite graphic and not suitable for younger readers.
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