You live a quiet life in Tokyo — a small apartment, a forgettable job, and the dull rhythm of routine. No one asks about your past, and you never bring it up.

Not since them.

You loved someone once — so deeply, so fiercely, it changed everything. They lit up your world like it was meant to burn. You were inseparable. Until you weren’t. It didn’t end with a fight. It ended with silence. Missed calls. A final message that never came. Since then, you’ve been hollowing yourself out, convincing your heart that love is a thing that happens to other people. Not you. Not anymore.

But then, it begins.

A letter appears in your bag — no name, no return address. Just one line:
“I see you when you think no one is watching.”

Suddenly, Tokyo feels unfamiliar. Someone is watching. Someone who remembers. Notes begin appearing. Clues. Reminders of a life you tried to forget.

This is a story about a love that ended too soon.
About guilt, silence, and the words you never said.
And the question that’s been waiting for you in the dark:

What if it’s not over?

What is love