House of the Disappeared (2017)

While HOTD is much heavier/darker in tone, both movies are about a house with parallel times and the choices the main characters must make as a result.

Both involve timelines bleeding into each other at a certain location, allowing time travel, but only at a set number of years. Both leads have lived his or her lives haunted by a tragic loss. Both stories have a melancholy feel and an either sad or very bittersweet ending.

Both involve different timelines crossing over at a specific part of a building (window vs. door). The FL in both is trying to find the fate of someone who is missing.

Both are Korean movies about timelines crossing into each other from the past to present. The heart of both movies is a parent-child relationship (adopted or biological).

Both involve time travel within a relatively short period that can only happen due to a specific location (a train vs. a door). Both have unexpected twists and choices made by the main characters.

Ah, don't we love loops? People not knowing they are dead, bumping in diff dimensions with different people that also died there. (died, disappeared). Honestly both are masterpieces. A+ Guimoon more scary horror House of the disappeared has rather touching story than horror