This story takes place in the two years between the war with Plegia and the War with Valm. Lucina is captured by slavers, and forced to live in harsh captivity.

Rin has certain feelings for her twin, and the rest of the apartment is out on vacation, leaving them all alone together. However, Rin's feelings are mostly one-sided. With life as it is, Rin tries her best to secretly satisfy her urge, resigned to perverted nighttime antics. But can the situation stay afloat for long? Kagamine Rin/Len, twincest, etc.