Lysis | BKDK

The sun rises and falls sixteen times before something happens again.

It's the woman again, with a smaller vacuum in her hand, along with a manila folder full of papers. Katsuki watches as she walks around the apartment and cleans up the dead bugs and cobwebs lying around, and leaves the manila folder on the granite countertop after she leaves.

The sun sets, and soon after it rises, Katsuki's life changes.

Or

Katsuki is a ghost haunting an apartment that Izuku moves into after a year of being empty.