It slows you down. Where the first series played twelve sisters for harem noise, RePure splits itself in two and dares you to sit with the quiet half: each early episode hands the screen to one sister alone, mood over plot, long silences, light through a window, a girl waiting for a brother who moved out. Chikage's tarot gloom, Rinrin tinkering, Shirayuki in her kitchen, Yotsuba playing detective, all of it rendered as small solitary portraits instead of a group gag. Then it flips to the chibi Pure Stories shorts and lets the whole cast be loud again, which is exactly why people call it slept on. Nobody expected the Sister Princess sequel to be the one with atmosphere. Watch it for the episodes where almost nothing happens and Wataru barely appears, and you still feel how much the house misses him.
After a long time at home, Wataru decides to move out and live on his own. His sisters have split up as well, and most of them now live apart from one another. Even so, none of them has forgotten their brother, and they keep coming together to see him and each other. The result is a drama with romantic leanings about siblings who stay close even after their household breaks apart.