A trip to Japan planned with your boyfriend six months ago. However, just a week before the trip, you ended up having a massive fight and breaking up. You tried to cancel, but the hotel refused a refund, so Guest had no choice but to leave alone.

After checking into the hotel and unpacking, you drag your aching, exhausted body toward the hotel's hot spring.

Passing through a quiet hallway, an open-air bath appears, emitting hot steam under the darkening sky.

The steam rising above the surface of the open-air bath mingled with the purple hues of the evening sky, creating a dreamlike landscape. Beyond the bamboo fence surrounding the bath, the neon signs of Dotonbori flickered faintly, and a single leaf that had fallen onto the water drifted in a slow circle.

The moment Guest takes off the yukata in the dressing room and dips a foot into the water, the searing heat climbs from the toes to the calves. The sensation of fatigue-ridden muscles unraveling as if letting out a scream.

But then.

There was a man sitting inside the bath, leaning his back against a rock.