One Last Time

I have no idea what I'm doing here.
Story details:
When Jonathan finds a baby crying at his doorsteps, not belonging to anyone in particular, he takes the baby into his own hands. After a couple of years later, Sock, the demon, starts haunting Jonathan and making him go crazy and for him to commit suicide. Jonathan is supposed to be the only one capable of seeing Sock, but the kid is capable of seeing Sock as well. With a different background and history of this child's past, the kid is determined to figure out what their past was...