Ever since their school days, Tsukasa Jinguuji has always been lucky with women thanks to his handsome features, while Hinata Tachibana has had almost no luck, constantly living in Jinguuji's shadow. But Jinguuji has never shown any interest in romance, whereas Tachibana is always desperate for a girlfriend. Despite their stark differences, they remain best friends even into their thirties as office workers.
One night, the two are heading home from a mixer where Jinguuji, as usual, was the center of attention. In his drunken complaints, a frustrated Tachibana accidentally wishes to become a stunningly beautiful girl with irresistible charm. As if the heavens heard him, a goddess suddenly appears before Jinguuji and Tachibana, transporting them to another world to defeat the Demon Lord while also granting Tachibana's wish.
Tachibana—now in the body of an impossibly perfect woman—has become so attractive that even Jinguuji is captivated. Furthermore, Tachibana becomes aware of Jinguuji's good looks, finally understanding why he is so popular. Before they fall in love with each other, the pair must complete their mission or risk being trapped by their own infatuations forever.