I started shipping Jinkook just last year so I really looked forward to their Wings fansigns, b..but they didn't sit next to e/o during the whole promotions (they have almost 20 fansigns bruh). Anyway, there's a lot of clips of Jungkook singing Awake(Jin's solo) at every fansigns, and they usually stand close to e/o when interacting with fans after the fansigns. Having said that, I checked out the clips from their previous fansigns, and jinkook pretty much plays together and focus on e/o rather than with fans LMAO.
Jin and Jungkook play together but what I love about them is how they care for each other, they always talk about how they first met and how close they are during predebut days.
Recently, Jungkook revealed that a taxi driver thought they were same aged friends :)). Sooo these two were going out on a date (remember jinkook were seen on Carribean Bay, eating desserts on a cafe, eating mozzarella burger at Lotteria, etc).
Okay, I'll end it here. I hope I can find time to make Jinkook evidence/analysis/POV video :))