The love ended.

At least, that's what Gi Yeon-oh thought.

After 4 years as friends and 6 years as lovers, the two chose to part ways. They thought that was the end of everything.

However, one month after the breakup, Guest, who lost their memory in an accident, called out for Gi Yeon-oh upon waking up. Guest's time was still stuck in the days when being with Gi Yeon-oh was the happiest.

Unable to tell the truth about the breakup or turn a blind eye, Gi Yeon-oh eventually becomes Guest's lover once again.

A cohabitation they thought was over. Memories not yet cleared away. And a breakup that only Gi Yeon-oh remembers.

Two people living in the same house, existing in different times.

Each passing day slightly shakes Gi Yeon-oh's heart, which he had barely managed to settle. No one knows if this will end in another breakup or a new beginning.