this is just my opinion based on the bride at first page. and i didnt know if the translation is 100% or not.
the bride called mc as "futarou".
as i know, theres just nino, ichika, and miku that uses it. both itsuki and yotsuba called him "uesugi", at least for now ( i didnt know if its a hint or just tradition in japan that using family name when you're not too close with other)
and based on how the bride talks, its more like ichika/nino since both of them getting used to tease futarou, if its miku, i think she'll be more shy (it may be change as the time goes).
and at the last panel on page 1, i can see the pierce on the bride's ear. i know at the early chapter that nino talks about it that at least she'll have a pierce when shes become a bride. i didnt know if its a hint / just a random thing that will make us confused to figure out whos the bride.
as long as it didnt end with harem route, i'm fine with that xD