Venus to Mamoru!

Mamoru Yoshimura has just transferred to a new school where students are able to control the mysterious magical power called Beatrice. On his first day, he meets Ayako Takasu, who promptly confesses her love for him. Everyone is interested in Mamoru-kun because of Ayako-san asks him out when he just gets to school on his first day. Mamoru-kun is then introduced to the Student Council members.

With the Astral Fire weapon stolen, it's up to Ayako-san and Mamoru-kun to retrieve it. Luckily, this also gives Ayako-san some alone time with Mamoru-kun on their first date together. Mamoru-kun asks Ayako-san out before Ayako-san can say forget about me, and she is in great surprise of what he says.

Ayako-san and Mamoru-kun get to school the next day only to have problems like a banner announcing them going out and photos of them but on top of that a recording of the incident of the confessions. The Student Council decides to throw a welcome party for Mamoru-kun at Ayako-san's house, where he learns a little more about her past.

Mamoru-kun is asked to play the Prince in the play 'Sleeping Beauty' during the school festival; Ayako-san, of course, is asked to play the Princess! After being asked to be the Princess of Sleeping Beauty she, Ayako-san, faints from a cold or so we think.

Ayako-san falls ill just the day before the school festival. It's discovered that the Beatrice power within her is reacting to her puberty, and will take 3 days to normalize, which would force her not to participate in the play. Mamoru-kun offers to use his Beatrice powers to help, though there is a major risk involved. Will they succeed in their plan?

Ayako-san and Mamoru-kun spend less and less time together as the student council prepare for a skiing trip. Little do they know they are being followed by the PreuBen's Demon's sister, Emelenzia Beatrix Rudiger! When Ayako-san asks Mamoru-kun to come outside so they can talk, he does not know what she wants to talk about so he goes back to his room to get his present and comes to find out that his gift for Ayako-san was broken and he receives a hand-knitted sweater from her. What is he going to do since his gift is broken and he has just received a gift from Ayako-san?