Forgive me... A woman's instinct

I got married because I loved you so much... It has been five years since she got married, and eventually she has not had sex with her husband, and although Yuki feels lonely, she is unable to tell her husband. Meanwhile, her childhood friend Noriko is ready to accept it and seeks a sexual outlet other than her husband, and has recently become obsessed with Oda-sensei, a business-on-site chiropractor. One day, Yuki is seen through her true feelings by Oda, who happens to meet him...