Side Couples In Media

Lately, I’ve been getting so annoyed by side couples taking over a manga/manhwa/manhua, whatever, that I’ve started developing an irrational irritation toward them. Which, obviously, I can’t let happen. They’re everywhere these days, in every form of media, so I’m trying to regain my appreciation for them.

So, guys, drop all your favorite side couples. As many as you like. We’re making this a Side Couple Appreciation Thread, mainly so I can learn to love them again
They can be super minor couples too, that’s fine. Just give me the ones you think are at least one of these:

particularly well-written,
don’t steal the spotlight from the main pair,
or are just plain adorable.