Shozo Murai, Saka's husband's grandfather, 70 years old. He's an old man, and even now, he's in good spirits, and has an abnormally strong libido. Since his wife died five years ago, he has lost his sexual desire every day and is in agony. In order to make his grandson-in-law, Sayaka, who lives with him, his own, he plots to draw sympathy by playing a weak old man. He uses the self-made burns as an excuse to ask Saka, who is her nurse, to take care of him, but...
