One sweltering summer day, Natsuo's husband brings home a junior colleague from his hometown, Kiyoshi. He's just come to Tokyo from the countryside and doesn't have a place to live yet, so he ends up taking care of him at home for a few days. At first, Natsuo is unable to hide his anxiety at his clumsy and scary-looking appearance, but as they spend time together, Kiyoshi learns that he is a pure-hearted and Kokoro-hearted young man. Meanwhile, as Kiyoshi spends time with Natsuo, who exudes a gentle and seductive charm, he begins to have special feelings for him, and is unable to contain his overflowing feelings...