Twins "Yuki" and "Mizuki." Yuki is tomboyish and always acts according to her own will, while Mizuki exudes a calm and refined demeanor. One day, the protagonist marries Yuki and soon feels overwhelmed by daily life—constantly at the mercy of her selfish demands, handling cleaning, laundry, and meal prep. Sensing the couple's struggles, Mizuki devises a special plan to help her brother-in-law. Using their twin resemblance as a strategic advantage, her scheme to improve the marriage takes an unexpected turn...