What Happens To Everyone Else In The Hikikomori Route?

The Sunny route of OMORI shows us the recovery of Sunny himself and all of his friends throughout their adventures before he ends up moving away. However, in the hikikomori route, Sunny ends up staying inside the whole time before moving, leaving the rest of his friends without him, and without the same experiences that led to everyone else's recovery. So without Sunny, what would become of his once close friends?