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Wholesome romance. No sexual contents. May have light kissing or closed-door romance. The main purpose of the story is romance.

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Has "light" or a few brief sexual contents. Not too much detail, but it does give some description of the action. The main purpose of the story is romance.

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There are several sexual contents that may have graphic descriptions. The main purpose of the story is romance. The sex scenes are used to enhanced the story.

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There are several graphic sexual contents, but the main purpose of the story is still romance and plot rather than the extensive sexual contents.

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Erotica. These stories has explicit sexual contents. The focus of the story is the sexual content.