This is when the main characters in any given story are undeniably a couple. (Thus, in heroic stories The Hero and the token girl are the usual couple, though it isn't always them.) The important thing to know about this trope is that the characters are overtly paired off, so even if they never kiss on screen or even flirt with other characters, it's understood by the cast (and hopefully the audience) that the two are an item. Naturally, this does absolutely nothing to offset Shipping.
Sometimes, there's another couple that sometimes serves as a Foil and/or companion to the "official" couple that involves The Hero. This other couple usually involves The Lancer and a minor female. This couple is called the Beta Couple.
Official Couple has been suggested to play 27 roles. Click below to see other actors suggested for each role, and vote for who you think would play the role best.