She is Yuuichi's stepmother. They are about the same age and she had been a widow since Yuuichi's father passed away. She had been living alone since Yuuichi is married to Kanami.<br /> <br /> Yuuichi realized that widows are often lonely without their husband, after his visitation to Suzuka's house - he saw her masturbating alone while watching pornography and he decided to comfort her loneliness with his male side.<br /><br />