One Piece dj - Oshihiki, 0 Centimeter

Pairing: Zoro x Sanji

One night, Zoro confronts Sanji with a confession on his feelings for him, and Sanji can't seem to figure out what to do from there. At the same time, Nami is on the quest to find a mine filled with gold, which shouldn't be a surprise to anyone. Once the crew sets down on land, Sanji tries his best to help while still trying to solve this new problem between himself and Zoro. It's during an inconvenient landslide that traps the two of them underground that Sanji realizes what his answer to Zoro is.

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Reprinted in Doujin Sakka Collection - MAYAMA Mirai (scanlated from this version)