Lagrange: The Flower of Rin-ne - S01

While Yoko's assistant searches the ocean floor for an unknown object, Madoka-still struggling to pilot Midori-returns to Kamogawa to celebrate the New Year. Back home, she receives letters from Lan and Muginami, who share updates about their lives, and Madoka quickly writes back. Time passes, and as Madoka advances to the next school year, Lan and Muginami explore a space-themed replica of Kamogawa on the tourist destination Polyhedron. This story unfolds between the first and second seasons.