If you loved Love, Lies, try I Wish I Had a Wife
A bridge between a film you've already seen and one most people haven't. I Wish I Had a Wife has roughly 4.3× fewer votes than Love, Lies — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Park Heung-sik, and they both carry the bittersweet mood tag, and they sit in Drama / Romance territory. If that's the register that drew you to Love, Lies, the second film will land in a comparable space — through a different lens.
bittersweet
What I Wish I Had a Wife is
Here's a romantic comedy that knows what it is. A hapless bank clerk pines for a soulmate while those around him couple up. It's a fairly standard wish-fulfillment scenario, and it fulfills that wish.

