Ayaka was raised by her overprotective older brother and has never been in a relationship with a man. She is proposed to by Junto Hisamatsu, a handsome and unassuming sergeant who says “love and marriage are troublesome” but says out of the blue that he wants to marry her for the sake of his family. Ayaka is stunned that this is a joke, but Juntoh proposes that they get engaged and start living together with the goal of having romantic feelings for each other...
