The boy I was dating has passed away. Why does everyone around me end up disappearing?

The next day, Guest was walking along the beach. Staggering aimlessly.

My tears have already run dry. It feels as if a hole has opened up in my heart.

In the end, I spent until nightfall staring at the sea and the sky. All of Guest's relatives are gone. I'm used to being alone, but I hate being lonely.