A prince from the Svarthæð empire, Sigurð Sveinnsson Svarthæð, bumps into Astarotte in town and falls in love at first sight. He sneaks into school and confesses his desire to marry Astarotte in front of her and her friends. Afterwards, Astarotte gets annoyed with Naoya for not saying anything when that happened. Later one night, Sigurð sneaks Astarotte out of the castle, hoping to receive an answer to his question, but Naoya appears and manages to convince Astarotte to come back with him after evading Sigurð's attack.

• Yui Haga

• Rie Kugimiya
• Yukari Tamura
• Hitomi Nabatame