Suekichi, like any other Japanese university student, indulged in hobbies. However, his great grandfather's funeral altered his life's pace. The morning after, he discovered a stunning girl beside him in his room. As his inheritance, his great grandfather left him a "small" fortune with certain criteria that must be met. Meanwhile, Aya, the seductive woman, persisted in loitering around him. Thus began a peculiar relationship of doubt and lust.