Rui would do anything for her younger brother, Kyo—a sensitive boy who became a shut-in after a confession to his male classmate went awry. But she'll need money to care for him, and in a town where the highest of the high are neighborhoods separate from those who are striving just to make ends meet, that's no easy task. Due to her boyish looks, her friend helps her cross-dress to get a job at a host club (of sorts), but when her first interaction goes horribly wrong, she think's it's all over for her...until über-rich boy Toma saves her. Amused by her story, he makes her an offer she can't resist: Serve as his "male" butler until March of next year, and he'll give her $10,000...but only if her true gender isn't revealed!

Rui wants to get to know her master Tohma better so she can be more useful, but suddenly her crush, Haruki, corners her and says, "You're aware of my feelings for you, right?" And then, Tohma orders her to kiss him! A love triangle?! Caught in the middle, crossdressing butler Rui's life is heating up, and with the annual Pole-Toppling contest near, anything could happen!

Rui has been chosen to represent West Wing in the school's traditional autumn a pole-toppling contest! But the whole team is coming to the Marikiri house for two weeks to practice! Can Rui keep her gender a secret under the same roof as 30 boys—even in the communal bath?! Haruki's honey trap tactics to seduce Rui into spilling their strategy escalate, too... Can Rui really last all the way through March without being exposed?!

Tohma asks Rui to return to the Marikiri household—as an official, certified butler! Rui, overjoyed, sets her sights on passing the harsh certification exam... and, of course, she must continue to hide the fact that she's a woman or risk being disqualified outright! Hatarai-sempai's guidance and instruction is crucial to passing, but as the intimacy between them grows, so do Rui's feelings! Between Tohma, Haruki, and Hatarai, how can she choose?!

Rui has just begun to walk the path of a licensed Marikiri family butler, as her relationship grows closer with fellow butler Hatarai, when Haruki suddenly asks for her hand in marriage! Meanwhile, Tohma's fiancée, Kotone, leaks the fact that Rui is a woman to the secret head of the Marikiri family, the Grand Lady! Rui's position as a Marikiri butler is taken away, but a path remains for her to regain it... and her master is on the move to help!

In order for Rui to return to Tohma's side as his butler, Tohma must prove to the Grand Lady that he can support her by his own efforts—without relying on money or assistance from Saginuma or the Marikiri family! But the new contract Saginuma has drawn up in preparation for Rui's return states that she is to be his butler and fiancée both! Rui is torn between her feelings for "the person I love most" and "the person I want to be with forever"... and her mixed affections for Haruki, Hatarai, and Tohma lead her to different answers! Who will she choose in the end?!