Irium

Overview

Irium—a tablet that allows one to lose consciousness for a single day. When consumed, your life carries on as usual and then once consciousness resumes, you'll remember all your memories of the day. Therefore, one can simply take the pill to skip a day while remembering the entirety of it later, without feeling the passage of time. However, with a medicine such as this, the possibility of controlling one's memory arises...

Source: AniList