"In other words, you're the newbie here."

I could do nothing but stand there dumbfounded as four pairs of eyes stared at me from all angles.
I started living on my own at the mansion my antique-dealing grandpa left for me.
Or at least I was supposed it but there were four residents before me.
They can pass through walls and don't even age!
That's right. They are ghosts who have stayed in this world!
Everyone is unique in their own way and I love the lively and cheerful time I spend with them but there are still times of sorrow…
My life with these ghosts who grieve silently begins here!