“I'll take responsibility.” Is Saki's future husband already part of her family!? Saki, the eldest sister of the Fujinami family, has never had a boyfriend. The cause? Her three brothers: Shinobu (oldest), Takaomi (older), and Mitsuki (younger). They're her incredibly good-looking and overprotective step-siblings. Saki's well into adulthood... and she wants a boyfriend! As luck would have it, she just got invited to a company mixer! But despite her attempts to shake off her brothers, they still stop her from going. “How dare you stop me from finding my future husband!” Saki objects. The brotherly reply? “You'll find your future husband right here.” A shocking development!! Thanks to Takaomi declaring his intention to marry Saki, a fight breaks out between siblings over who gets to be her husband!! As they embrace her, not as brothers, but as men, and lock her lips in deep, wet kisses... what if Saki falls in love with one of them!?