One person I know with agoraphobia was once trapped in their own home for weeks. Just the thought of going outside, like to the mailbox at the end of the driveway, made them break out in a cold sweat. They feared having a panic attack in public and being unable to get help.
Real stories help us understand the symptoms. For example, when someone shares how they feel dizzy and short of breath just thinking about leaving home, it gives a clear picture of the physical symptoms.
I don't have the exact name of the person who created the Omori manga at hand. It could be worth doing a search on manga databases or asking fellow manga enthusiasts for the answer.
Omori is purely fictional. The story and characters were imagined by the creators, not drawn from real-life events. It offers a fantastical and imaginative experience for players.
At the moment, there's no definite date for the Omori manga release. But you can follow the official social media accounts or manga forums for any potential news or leaks.