Aegri Somnia is a fan project based off Atlus' Persona series (a just-for-fun deal, basically). While it takes place in the same timeline, the settings and characters are original; official characters might make cameo appearances at most.
The story takes place early spring of 2014 in a fictional American northeast town known as Estergate. Much of the plot revolves around dreams.
Needless to say, everything's in a rough stage. Expect a lot of changes.