When Keiichi found his grandpa's diary and saw a treasure map inside, Skuld and Urd started to feel a great urge to search it. With the company of his friends, Keiichi arrives to Honda Inn, the place indicated on the map. Once the party is inside, they meet Honda Chieko, who seems to share a certain promise with Keiichi. Apart from all that confusion, it's time for Keiichi to have enough courage to say the words I love you to Belldandy.

The series is about a missing genius whose mysterious disappearance becomes a shady secret among the successful members of society. (source: MAL News)

When college student Keiichi Morisato dials the wrong number while ordering for some food at his dormitory, he accidentally gets connected to the Goddess Hotline and a beautiful goddess named Belldandy appears out of a mirror in front of him. After getting kicked out of the dorm, Keiichi and Belldandy move to an old shrine and soon afterwards, Belldandy's sisters Urd and Skuld move in.

Mysterious immortal humans known as Ajin first appeared 17 years ago in Africa. Upon their discovery, they were labeled as a threat to mankind, as they might use their powers for evil and were incapable of being destroyed. Since then, whenever an Ajin is found within society, they are to be arrested and taken into custody immediately. Studying hard to become a doctor, Kei Nagai is a high schooler who knows very little about Ajin, only having seen them appear in the news every now and then. Students are taught that these creatures are not considered to be human, but Kei doesn't pay much attention in class. As a result, his perilously little grasp on this subject proves to be completely irrelevant when he survives an accident that was supposed to claim his life, signaling his rebirth as an Ajin and the start of his days of torment. However, as he finds himself alone on the run from the entire world, Kei soon realizes that more of his species may be a lot closer than he thinks.