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2017 absurd_res ambiguous_gender arms_tied black_and_white black_body bound dated duo greyscale heart_symbol hi_res human humanoid larger_ambiguous larger_humanoid legs_tied male mammal monochrome monster monstrous_humanoid paper pink_heart restrained restricted_palette scp-2521 scp_foundation signature size_difference smaller_human smaller_male tentacles traditional_media_(artwork)zhange