I lost my mother when I was young, she left me and my dad to live together with each other. Dad wanted to ease my pain, he let me live a life without worry. Then suddenly one day, my father introduced me a young and beautiful woman he married because she coveted the man’s property. Seeing her sincerely loving my father, I began to open my heart to her gradually, however… Seowoo is a boy who has never had intimate relationships, but he did not know that from a video he saw on the internet. He discovers the secret of his young stepmother and his friends, this will make them more involved with him, his stepmothers and friends...