Honestly, if the author is forced to rush the ending, then why not go all in on the ridiculousness.
Though I think one more Volume would have been enough to set up Kippeis "Fiancee"and the groups plan to save him properly, but it is what it is. It could have ended so much worse after all...
I am happy that they got together in the end, but I would love to see more of their actual dating live.
And I choose to interpret Kippeis "Man or Woman, I love you Makoto!!" as him being bisexual, with a very specific type.
Thank you for translating this wonderful Manga, and I hope there'll be even more like this one in the future ^^