Rika, who had moved in to live with him, falls off a stepladder and hits her lower back, injuring herself. Makoto remembers that he had introduced real estate to Ito, a chiropractor, and contacts him and decides to have him come on a business trip. Since she was introduced by her boyfriend, she receives the treatment with confidence, but Rika's sensitive private parts are touched so much that she resists, but she writhes in pleasure. The next day she received treatment from Ito and learned her secrets.