Ne-ne, the sister who is about to get married, has such severe mysophobia that she can't even kiss her fiancé Izumi. Fearing that she won't be able to pull off the vow kiss at the wedding, Ne-ne asks her younger brother Tomoki to practice kissing with her. Will Ne-ne be able to successfully kiss Izumi? And what will happen between her and Tomoki... Tongues entwined, saliva mingling, the kiss practice gradually turns into the real thing for the two of them. Forbidden incestuous NTR sex.
