Teenage Sunny, a nonverbal shut-in (or hikikomori) dealing with the death of his older sister, leaves the house for the first time in years when his old friend Kel appears suddenly on his doorstep. At the same time, Sunny's dream-world alter ego Omori embarks on a quest with Kel and their friends Aubrey and Hero to search for Basil, a missing member of their group. Together the party must navigate the perils of this strange world, as well as their complicated feelings and repressed memorie...

SUNNY has been shut up in his room for four years, and now there are only three days left until he moves. He and his childhood friend KEL do what they can to repair the relationship between their old chums AUBREY and BASIL, but soon the adventure has taken on a life of its own. Traveling back and forth between the real world and a strange dreamlike world of secrets, SUNNY tries his best to pick himself up and reclaim his future, but something far more terrifying than he may realize lurks w...