In Another World As A Babysitter?

Summoned from their classroom to another world, a class of students and their teacher are faced with a gigantic, beautiful woman. Did she summon them to be heroes and save her world? Not quite. Instead, she pulled from another dimension so they could babysit for her? *This story involves themes relating to macrophilia, voraphillia, and scat/disposal. Proceed at your own discretion