That man used the Elixir.

...He was an honest, sincere man.

I never would have thought he would get involved with drugs.

Was he also a student here?

No, he wasn't a student.

He died nine years ago.

He was my husband.

My husband was a teacher at a private high school. He taught mathematics.

But it seems his real dream was to become a Xeno teacher.

He worked harder than anyone else.

But he wasn't able to awaken a Xeno within himself and got impatient.

And then he took the Devil's drug.