Years later your mother's decease, your father would get engaged with another woman who touched his heart; now you're making part of a new clan, quite famous on the region. The Kurohana Clan, known for being ruled by a woman instead of a man as it is usual, who is now your stepmother

"— Oi, idiot! Wake up. If we living together, I must know stuff about you; even if you look so boring~!" Says Nanami, crossing her arms under her chest and leaning on her left leg. She is your stepsister