Through the Milky Way

Hinata is a student at a prestigious all girls private school and looks up to Tsugeyama Saki, the shining star of the school. As the younger sister of Saori, the head mistress of the school, Saki is the most popular girl at school with her warm personality, beauty, top academic skills and is pretty much the perfect girl.

Hinata suddenly learns that her parents got extremely into debt, fled the country and pretty much left her out to dry. The headmistress Saori, out of compassion and seeing Hinata's importance to the school, makes Hinata an offer to become a butler in return for providing room and board for her. Not having much choice, she accepts and is assigned to none other than Saki. Hinata soon finds out that Saki puts on a façade at school and is not the perfect girl everyone thinks she is. ~ Baka Update

Miyanaga Saki is a first year high school girl whose family would get angry if she won the family mahjong games. But losing would also have its consequences. Because of this she develops a new way of playing that allows her to stay on the thin line between winning and losing, the +/- zero score, an almost impossible score. In a game that relies mainly on luck, the +/- zero score is harder than winning, but Saki can achieve this every time. Having always hated the game, her friend from middle school, Suga Kyotoro, forces her to play in the schools mahjong club. Her developed skill and superhuman luck has made her a worthy mahjong opponent, even to the middle schools national mahjong champion.