Dont worry about the rushed end, because this manga already have sequel with title Life So Happy, the manga is continuing the Grown Up Twins as the Main Character and theres still slmany story about the date of Shiharu and matsunaga until the wedding. Its slow pace and very detailed. So dont worry about the rushed end in this Title
One of my all time favorite manga, and I don't really read Shoujo. My only wish would be a epilogue chapter. Edit: I also see now that I already commented 1 year ago, it's that good.
It is very cute, warm, soft sweet story, that comforts the heart. The only problem, is the ending. I wish author added extra chapter about their lives in the future