This really really looked like Studio Ghibli's work.
Mostly because there's magical furniture.
I was proven wrong.
The animation was beautiful and atmospheric, the characters looks cute. Hell, even the chair looked like a handsome/beautiful bastard.
The music was used in good moments (jumps, drama, etc) and changes tone at the right moments.
The only good character is the chair, which is the story changer, he's the best character because:
He helped the girl get new friends, therefore have a good childhood.
And mostly because he helps her at all times.
It's just 3 minutes and a half, and surprisingly: It made me write this review.
Why watch it?
Just watch it.
Best ONA i've ever seen.