if you're looking for a "well-built relationship" then this manga's couples were obv not it compared to the other author's work - ao haru ride. yuna and rio were just the most exciting for me and made me keep reading the manga. if you liked the other couple then good for you. (▰˘◡˘▰) but the shoujo genre will mostly always lean into the cliche and if you will, "unrealistic" category of mangas so i'm not sure what you were expecting lol.
yea i said that bc the main couple in ao haru ride was REALLY REALISTIC (when futaba was going out with toma and all) and not much cliché
i can relate with the second ship more than rio and yuna... im not that much into unrealistic stories (reminder that rio started to like her thanks to a dream)
but you are right everyone have their own taste
yuna and rio's scenes were the only ones i looked forward to ┑( ̄Д  ̄)┍