Ichimatsu struggles to get any sleep with his brothers being noisy all night and refusing to turn off the light. Unable to take anymore, Ichimatsu starts monitoring the brothers' courtesy towards each other, leading Osomatsu to get criticized the most. Later, Iyami proves his skills at the arcades by playing games at their highest difficulty.

Ichimatsu becomes paranoid when lucky things happen to him all day, so he and Jyushimatsu try to punish themselves to balance things out. A lovey-dovey couple go to a hot spring inn that's haunted by a zashiki-warashi named Osoma.