Shortly after our wedding, I expected to spend romantic days alone with my wife. However, due to sudden home renovations, we had to stay at my wife Misa's parents' house for a while. There, I found myself suddenly living with her outspoken divorced older sister, Ichika, and her flirtatious, man-loving younger sister, Erena. Surrounded by three women, I struggled to adjust to their sensual charm and build familial bonds. Meanwhile, Misa remained constantly vigilant toward her sisters. Thus begins a newlywed life filled with challenges as we strive to maintain a new family balance.