Since Sanji is mad at Jinbe for having a higher bounty than him and for the stuff in Fishman Island, he's always being super passive-aggressive toward Jinbe. Like, glaring at him, chopping fish aggressively while looking in his direction, that kind of thing. Meanwhile, Jinbe just looks at it like "Wow, that guy is SO dedicated to his craft! What an upstanding young man! I love fish! I should help him out!" and tries to help cook and clean, but Sanji's like "THIS ASSHOLE! He's trying to take my job!"
He sees him like, hanging out with the rest of the crew, who all enjoy hanging out with him. Like, Luffy shows off his new techniques to him, and Jinbe's sitting back laughing and clapping. Zoro's trying to hide it, but he thinks the move where Jinbe throws him is awesome, so whenever anything happens, he goes "ugh, Jinbe, looks like we have to do the Fastball Special again," and Jinbe's like "I mean, it's not that far away, you can just jump, but sure!" Nami talks to him a bunch since he's driving the ship and she's telling him where to go and what the weather is, and he's telling her what's he sees underwater with his Haki and such. Usopp is telling Jinbe stories, and he just assumes "Well, I've seen some crazy shit, some of these might be true!" and cackling his ass off. Chopper just instinctively enjoys hanging out with all his crewmates, and Jinbe carries Chopper around on his shoulder, and when they get tired and it's sunny out Chopper passes out on his stomach like a cat. Robin appreciates that Jinbe's a calm dude, and lets him read her books as long as he dries himself off first. Franky and him go swimming together, and he's confused because Franky keeps trying to arm-wrestle him, but is happy when he learns he was the adoptive son of Tom, who seems like the kinda guy who would come down to build stuff for the orphans back when he was on Fishman Island and Jinbe was like 3 or something. Brook sees Jinbe and Zoro doing the throw move and keeps trying to come up with a combo move the two of them can pull, and Jinbe's just happy to be included.
Sanji sees this, goes "Oh, so he's hanging out with Nami and Robin? This old pervert, I'll beat his ass! He'll never be the 2nd strongest! NO YOU ******* AREN'T, MOSS HEAD!" He challenges him to a cooking contest with the dish he's best at cooking, so in the first round, they catch fish, which Jinbe beats Sanji at, and in the second, they prepare it, and Sanji's able to do it faster, and then, in the final round, they cook it, and everyone's going "Damn, I can't decide, these are both good, they've each done a different thing with the limited amount of ingredients," but Jinbe's like "Hey, you don't have to pretend, he did way better!" and Sanji, taken aback, tries both, and says some shit like "Jinbe, I've misunderstood you..." because he's Sanji so he can probably detect the feelings someone had while cooking.
Cut to a week later, Jinbe's hauling some stuff he found in the ocean onto the ship. He gives everyone a cool little trinket he found on the ocean floor, then gives Sanji some cool plants he found, and Sanji goes "Ah, these ones are known for their strong flavor, we can grow them in the aquarium."
Cut again to those plants growing in there, and zoom out. Sanji's cooking a meal of some kind, and Jinbe's sitting next to him, cleaning the food and washing the dishes at the same time with his hydrokinesis. Someone walks in, asking when dinner's going to be. Both turn, and grin, determined.
"Five more minutes."
...
. Ain’t no amount if “emotional conflict” explaining that.
