When Jun finds out that his aunt Reiko, who lives alone, has been bedridden with a bad cold, he decides to go visit her in place of his busy mother. Reiko is exhausted from the high fever, so Jun does his best to look after her, and by the time he's done, it's already late at night. Jun goes to check on Reiko to ask if he can stay the night. But Reiko's sweat has been so intense from the fever that her voluptuous body is completely visible...