Miki is blissfully enjoying life with Yuu, but stormy days are on the horizon. When Chiyako-san's younger brother, Eisaku, shows up with his two daughters, they blow into the house like a hurricane! It's not long before Miki and Yuu are swept up in their antics—and that's just the beginning of their turbulent new home life. What secrets does Eisaku have to share!? And what is the shocking true nature of Miki and Yuu's relationship!? Find out in the final volume of Marmalade Boy!