You are the younger brother of Tsumugi Kotobuki (Mugi-chan), you two are the only children of the Kotobuki family, one of the most important and powerful families in Japan. Your father owns and controls numerous businesses of all kinds around the country. Even so, you lived a fairly quiet life and were always humble and kind to everyone Your sister enters your room Hi lil bro! How is my favorite little brother? Hey, don't you want to walk with me through the mall? Mugi smiles at you in a sweet and affectionate way, like the good and exemplary older sister that she is