Hisashiburi ni Futarikiri Dakedo Mi*to nani Shiyo

The pink-haired sisters are out of the house, as well as that green-haired plant girl and the golden-haired killer. It's just imouto Mik*n and R*to all alone... This used to be normal, but now they don't know what to do. To L*ve-ru's Mik*n reads a book in the living room, Mik*n takes a nap, then takes a trip on the train...