Have you read Futari Bus?
Great manga, but it's one where I actually am itching for some more progress... Like if they could just sit next to each other

But still one I wholeheartedly recommend.
I also recommend for anyone who likes this manga to watch the C-Drama
When I Fly Towards You (YT version cuts a music track or two. It's available on Netflix). lt's wholesome, nostalgic, drama-free, and giddifying, and the main pair is super sweet, with similar personalities to Chokki and Shun. Just great vibes all around.