Sayoko enters into a contract with Mara and achieves her desire to become Nekomi Tech's queen in the most literal sense of the word, as she transforms the university into her own kingdom!
Summary
At night, Sayoko whispers to the stars, wishing to become Nekomi Tech's campus queen once again. While Sayoko believes the stars are answering yes, Mara eavesdrops nearby and doesn't understand why she would waste her time wishing for something so stupid with so much sincerity. Nonetheless, Mara decides that she will take up Sayoko's wish.
The next day at Nekomi Tech, Sayoko comes across a poster advertising this year's campus queen contest and displaying last year's winner: Belldandy. Sayoko tells herself that she lost last year's contest due to Belldandy using her "witch" powers to sway everyone to her side. An envious Sayoko desires magical powers herself and tells herself she's willing to sell her soul to her to acquire it. Mara answers her prayer and accepts her wish to become Nekomi Tech's queen, though Sayoko wasn't serious about actually selling her soul.
Belldandy, Urd, and Skuld feel a disturbance and quickly meet up through teleportation right in front of Nekomi Tech, which has turned into a giant castle. They immediately suspect Mara's handiwork, though this isn't exactly her style. Skuld takes one step through the front gates and suddenly begins spouting her loyalty to a certain queen before Urd pulls her back to them, and Belldandy realizes that the castle is emitting a mind-force field. Keiichi catches up with the goddesses and also walks into the force field, where he reveals that Sayoko is the queen.
Indeed, inside the castle, Sayoko settles into her title as queen and has the student body and faculty swear fealty to her. She has a professor named Kajigaya read over a thesis she wrote—which he declares to be a work of sublime perfection—and she declares that those who obey her rule may gaze upon her beauty and hear her glorious words while those who don't shall be punished! To prevent themselves from ending up like everyone else, Skuld creates four Mark 1 "Will Wave Wall Shielded Ribbon Cables", which protect the wearer from the effect of the mind-force field. As they venture into the castle grounds, they're immediately met by Tamiya and Otaki, who attack Keiichi with the heat power of their flexing abs and squeeze him with their bodies. Belldandy quickly intervenes, summoning Holy Bell to cast a powerful attack spell (something she rarely does) and blows the two men away with a gust of wind.
As soon as she finishes, Belldandy falls to her knees out of guilt for having to harm two of her friends. Urd tells her sister she must accept that everyone inside this castle is now her enemy, even her friends. Belldandy agrees and says that she is willing to scar her own heart in order to save everyone and expel this demonic presence from Earth.
While the four vow to overcome this challenge together, Sayoko becomes aware of their presence in her castle and invites them inside to play her game, by her rules.