The short series will be divided into two arcs. The "Totoko x Muttsugo" (Totoko x Sextuplets) arc will feature the six brothers having conversations with Totoko, who will be depicted as "a certain princess." This story will have six "versions," one for each brother. The "Iyami x Muttsugo" (Iyami x Sextuplets) arc will feature the six brothers and their everyday life with Iyami. It will also have six "versions," one for each brother. (Source: ANN)

No anime background information.