Swapped Bodies, Unchanged Hearts

The originally loving male and female leads wake up after an accident to find they have swapped identities. Living in each other's bodies, they keep making mistakes in their daily work. When one of them suddenly disappears, the male lead notices cracks in the memories of their swap. Familiar scenes and confessions keep surfacing, and he finally realizes that what traps him is not the identity mismatch, but the past he cannot let go of.