One year after goddess Belldandy emerged from Keiichi Morisato's mirror and promised to stay with him forever, a new threat to their happiness emerges, one that could end the contract between Belldandy and Keiichi.
Damage to Yggdrasil from the incident with the Lord of Terror causes Keiichi's wish to be lost. Without a contract binding her to Earth, Belldandy is notified that she will have to return to Heaven unless Keiichi's wish can be restored. Belldandy's time on Earth is limited. Keiichi states that he wants to treasure the time he spends with Belldandy, and musters enough courage to invite her on a date.—theTVDB.com