After remarrying, my wife brought with her two young daughters—older sister Yui and younger sister Kotone—tiny, delicate girls who innocently call out "Daddy!" with pure smiles. Their slender frames and innocent expressions leave a strong impression, and occasionally glimpses of their budding chests or flashes of white underwear reveal their unguarded charm. One day, the two discover my secret affair with their mother, awakening their own sexual awareness, and they begin actively seducing me. As a result, my relationship with them deepens alongside my bond with their mother. They start questioning me, "Who do you like more—our mom, or us?" tormenting and manipulating my emotions. Amid this tangled situation, the story unfolds with complex family dynamics and emotional conflict. This work includes no performers under the age of 18 and is a narrative crafted from an adult perspective.