Yuukai Kon

A young woman named Kasuka, along with her father, struggles to keep their small coffee shop from being redeveloped. After her father is hospitalized due to the stress, Kasuka is taken against her will by the son of the company planning the development and held in his apartment. His goal is not only to acquire the land but also to marry her. The story also includes a one-shot titled "If no Sekai (Ifの世界)."