Aa! Megami-sama!: First End

Morisato Keiichi is an ordinary college student who has not achieved much in either academics or relationships. After dialing a wrong number, he unexpectedly summons Belldandy, a Norse goddess. Initially skeptical, Keiichi eventually asks her to stay with him permanently. Belldandy agrees to remain on Earth, bound to him for life. Their coexistence marks a dramatic change for both, as she adapts to human life and he faces the unforeseen consequences of his wish.