Father's woman

Since losing my mother due to illness when I was a child, I have been living in a small apartment with my father. My father was once a famous rock band in his hometown, but now he is a down-to-date old man who loves guitar. One day, that woman suddenly came. The woman, who was a bandmate with her father in the past, had a perverted body that seemed to be so lewd I couldn't hide the excitement in my heart. Then, after I collapsed from a high fever, the woman ended up taking care of me in place of my father who went to a live concert in the countryside...