Kami-Sama X Ore-Sama X Danna-Sama!?

Amane Ninomiya is a elementary-school sized high-school girl who stopped growing at seven years old. Amane, who is worried about her growth, comes across a weird (but handsome) boy who calls himself a god at the shrine of her grandfather. "I'll grant your wish and pay back your grandfather's debt," the god says, kissing her, and for some reason her body grows...!?