Riho, a withdrawn daughter who has been withdrawn for several months without going to school. A middle-aged male homeroom teacher who frequently visits his home at the request of his mother, who both works. At first, I was worried and listened to my worries instead of my parents, but gradually the male emotions came up and I couldn't suppress my reason and had a physical relationship several times. - The homeroom teacher, who was single and had no female relationship for a long time, used Riho's body to twist the big that did not subside due to estrus into her upper and lower mouths.