I didn't play the game and I think the ending is not bad.
There wasn't any big fight before they reconcile, but I feel it kind of fits the atmosphere of this last episode. Since they have decided to like it be a happy one, why create tension by having Mitsuki and Takayuki lay the table and trash everything out? Why have Haruka put up a racket before she concedes and step aside?
In the end, they chose to wrap up everything gracefully and dispense with all the angst and frustartion we had for so long. That in my book is not too bad for a happy ending.
