Saki, a salary man, almost reaches home before fainting due to fever, and college student Shinomiya coincidentally finds him. After regaining consciousness, Saki discovers that he is in an unfamiliar apartment and that Shinomiya has been taking care of him for two days. Not wanting to owe Shinomiya, Saki attempts to return the favor, but Shinomiya refuses. Fortunately, Saki devises a unique method to demonstrate gratitude, which results in both of them desiring more.