A quiet villa located by the seaside in Minami-Izu. Here, popular female author Misa Yuuki is deeply immersed in her writing. Known for her lyrical style, she has won numerous literary awards and earned high praise from readers. However, her peaceful days are interrupted by the sudden arrival of her younger brother, Hajime. As Misa's blood-related brother, he has always supported her—handling negotiations with publishers and managing her daily life. One day, Misa halts her writing and begins a secret affair with him. A forbidden sibling relationship begins to bloom. A journalist from Tokyo, having uncovered this shocking truth, travels to Minami-Izu. Hidden within the tranquil seaside villa lies a deeply concealed, explosive story.