Her boobs do get freaking huge from time to time.

I think you mean all the time. Sanae is one of the many touhous who the fan base has rejected her canon appearance for the fan made one. I'm not even sure what's canon anymore.

Skylander said:

I think you mean all the time. Sanae is one of the many touhous who the fan base has rejected her canon appearance for the fan made one. I'm not even sure what's canon anymore.

Technically, boob size are mostly non-canon, with a few exceptions.

Skylander said:

I'm not even sure what's canon anymore.

You are freeing yourself from the bindings of common sense.