I'm looking for the name of this Anime from the 80's. I'm sorry I can't give you more details, but I hardly remember it. I just remember it was very dark and scary, but I was just 8 years old(so maybe that's not very objective).
It is about a very very perturbed School Boy who became a kind of wizard, specifically a sorcerer. In one scene, for example, he dropped his bag and a dead frog, a poison, a book and some other creepy thing came out of it. He was always scared and stressed.
When the support character ( I can't remember if it was girl or a boy) tries to help him, they end up in a very creepy mansion. In that house, the haven of the boy was a magic painting of a landscape which acted like a portal to other "dimension" where he had a house. He kind of lives inside the painting.
Thanks in advanced!