https://www.mangago.zone/read-manga/aioi_focus/ i just read this one today and it's exactly like you describe! idk if the length/sex scene ratio is what you prefer since it's short and simple but complete
https://www.mangago.zone/read-manga/spinach_bouquet/ in the side stories the bottom has a huge growth spurt and is insecure about it during their first time. though the series itself is shounen ai with him still being on the tinier side
https://www.mangago.zone/read-manga/you_re_my_princess/ also a princely guy treating the tough guy like a princess
I love it when manly men get adored by the top and the bottom is confused as hell because they have a rough appearance etc. but the top thinks they are the most adorable thing ever making the bottom flustered sooo any good completed recs for dynamics like this? Not anything with too much possessiveness or toxicity please (and I would prefer sth with few sex scenes too if possible, shounen ai is fine~) Manga/hwa/hua are all okay too as long as it is completed like I mentioned (: