One day, Yoichi who grehile not knowing his parents has received the news of his father’s death His father left behind a testament----which said he is to pick only one out of five ‘little sister candidates’?!”…I don’t want to work, I want to laze around together with Onii-chan” (By Serene)”Let’s have a match! If I win, Nii-chan will… make me his little sister!” (By Toht? It’s our destiny” (By Sayuri)”To be irly, that’s why I want to be Nii-san’s little sister!” (By Yuuki)”If Mii-chan becoht?” (By Mika)The little sisters ere presented to him had more than one or two odd quirks, a slapstick cos starts here!