During her first year in high school, Ena received a series of confessions from strange guys. Her friend Miu made a joke, suggesting that her inability to reciprocate love might be under a curse. Soon after, Ena found out that her mother was getting remarried and she would be gaining a little brother and sister. However, much to her surprise, her "little brother," Touma, was not so little after all, and he was also very good-looking! Since they were not biologically related, Touma warned Ena not to develop any romantic feelings for him. How would their relationship evolve now that they were living as a family?
