During Yoko's search for something in the seabed, Madoka is forced to abandon piloting Midori and heads back to Kamogawa for the New Year celebration. After her arrival, Madoka is delighted to receive letters from Lan and Muginami detailing their latest activities, prompting her to send a swift response. As Madoka advances to the next grade level, months fly by, and Lan and Muginami explore a replica of Kamogawa on Polyhedron, a popular tourist planet. This event occurs between the first and second seasons of the show.