One day, Atsushi's mother tells him that his aunt Mikan, who lives alone, has caught a cold and is bedridden. He goes to look after her in her place. He immediately visits her at home, only to find that Mikan, who is waiting for him, seems to be in even worse condition than he thought. Since he is having trouble taking care of her and it is getting late, Atsushi decides to stay the night and goes to check on the sleeping Mikan. He is aroused by the sight of her sexy, sweaty figure due to a fever...