Nogizaka Haruka no Himitsu: Finale is a perfect way to end this series and basically any anime series, but why? Well not only does it include them becoming a couple, but also closes basically all of the plot points introduced within prior seasons and returns to some old locations we never thought would be returned to. Another great idea they did was the transition from Miran singing the OP to the N's, basically the whole cast, to sing it. If you are a fan of romance animes then this is a must-watch! Please don't miss this opportunity! I did a whole 12 minute review on myYouTube channel!
https://www.youtube.com/watch?v=CCeKOdhVudA