My Spirit Be with You

[Drarry] Over six years have passed since the war ended, and young Auror Harry Potter is leading a rather dull life, keeping to himself and battling a severe case of PTSD. At night, he is plagued by guilt over the people that lost their lives for him. One night, he feels a strange presence and hears a voice taunting him. Is he going insane, or is there really someone in his house?