One day, honor-student Shiizaki Lulu observes Katya and Hana together in the science lab preparation room. She is discovered and caught. Katya draws close to her but suddenly stops.

Shortly after, Lulu accompanies her mother to a suspicious ritual being performed by mysterious cult.

~ translated and adapted from official site by Cranston

Note: Bundled with the 10th volume of Seikon no Qwaser manga.

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Parent story: Seikon no Qwaser