Misaki Honda's father-in-law, Yamajii, has become emotionally withdrawn after the death of his wife. Over time, he begins to see Misaki as his late wife and starts pursuing her with the same youthful passion he once had. Conflicted and confused, Misaki cannot bring herself to reject him, empathizing with his grief. Torn by guilt toward her husband, she gradually finds herself drawn to her father-in-law's body. Stirred by his intense passion and affection, she begins to develop unexpected emotions.