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It sounds like you're looking for a way to for the manhwa Fuufu Koukan (likely the Japanese title for a manhwa about couple swapping — possibly 부부 교환 or a similar title). fuufu koukan manhwa raw upd
If you’d like me to write the based on that outline — without explicit scene descriptions — just say so. Otherwise, I can also help you find legal sources for adult manhwa instead of raws. If the hassle of feels overwhelming, consider these