Jungkook goes from thoughtful and introspective to delighted in the space of a moment and Seokjin's reminded that he really is the youngest of them. Jungkook is so mature that it's easy to forget a lot of the time. It's why he fits in with them. Seokjin, on the other end of the spectrum, makes a point of being immature whenever possible.

"I've never had friends like you guys. A trip like that with the six of you would be perfect." And no matter what else happens, they'll always have those memories. Seokjin prays they don't drift apart but he knows it could happen. In a perverse way, that gives him hope. He's never feared it so much with other friends and now he feels like this is worth trying to keep.