Or, for a more idealistic outcome, each and every single one of the couples get a happy ending! From the Beta Couple, to the Yaoi Guys, all the way through the Mayfly-December Romance, the Ghost Ship, the High School Sweethearts, the Lady and Knight and everything in between! All of them get to enjoy a mostly joyful and well deserved resolution to their romantic pursuits.
Downplayed: ???
Justified: Alice and Bob have fallen in love during the course of the series, as they faced their adventures together.
Parodied: After so much pain and sacrifices, Bob finally manages to resolve the story's big conflicts, so now he's free to enjoy the rest of his life with his one and only soulmate! Alice!... The incredibly gorgeous and courageous mannequin girl! The last scene is them Riding into the Sunset in a goofy golf-cart.
Zig Zagged: Alice and Bob marry at the end of the series, then divorce a year later, then eventually marry each other again, and divorce, and remarry each other...
Defied: Alice and Bob decide that they aren't a suitable match (either before or after the wedding), or that they have issues to work on afterallthey've been through before they can be happy in a relationship, and call it off.