My sister, who has obsessive-compulsive disorder, asked, "Want to practice kissing with me?" We kissed non-stop until we were practically drooling in the week before our wedding. I always used condoms during oral sex and intercourse. A woman who had never kissed before in her life. Yoshitaka Nene FSDSS-757

Ningning, the older sister who is about to get married, has a severe case of mysophobia and is unable to kiss her fiancé, Izumi. Worried about failing to kiss him at the wedding, Ningning asks her younger brother, Yuuki, to be her practice partner. Ningning wants to know if she can successfully kiss her fiancé and what her relationship with Yuuki will be like… Their tongues intertwine, their saliva mixes, and their kissing practice gradually turns into serious sex. This is a forbidden incestuous NTR sexual act.