Momoyama Kyodai

Arima and his younger sister Chihiro are twins in the Momoyama family, but they have long wondered whether they were adopted. Six years earlier, they overheard their parents promise to tell them the truth when they turned sixteen. On their sixteenth birthday, the twins finally learn what their parents have kept from them—and the truth is even more shocking than they expected. The comic also includes an award-winning one-shot.