The short series is split into two arcs. The "Totoko x Muttsugo" (Totoko x Sextuplets) arc features the six brothers conversing with Totoko, who appears as "a certain princess." This storyline includes six "versions," one for each brother. The "Iyami x Muttsugo" (Iyami x Sextuplets) arc depicts the six brothers and their daily life with Iyami. It also contains six "versions," one for each brother.