This ending ... Why !? OK author so if this is your ending then let me put the final dot.
Kuro and Miyabi have a lovely, solid and respectful couple
Her friend from overseas married a foreign guy.
Reiichi married her waifu, Risako !
And Uta still have her f*cking unrequired love for Kaoru and can't move on. After finishing her study and getting a job they decided to live together. Better be near her than letting her find another man. Sometimes looking at Kaoru make Uta sad because she know she will never have her feelings reciprocated but she remember that now the two of them are roomates/good pals so we can say that they are like a couple after all they live together ! And to cover it up they also decide to live next to Reiichi and Risako and be happy. After some times Risako will have her children and she will let Kaoru look after them and the children will consider Kaoru like another mother. But then we will discover than Kaoru still have feelings for Reiichi and she only decide to divorce of him because she was feeling guity about what her mother tell him before she died. And then Uta will discover that Kaoru and Reiichi have an affair and she will decided to marry a guy and leave Kaoru have a treesome with Reiichi and Risako. Moral being gay is too hard.
THE END. (Ok it's ridiculous)
Honestly better that ending the author give us than nothing.