Incestuous relationship with a cousin she has not seen in a long time: Tsubaki Sannomiya and his cousin has not seen each other for a long time, and now they are all grown up. Pero sa sobrang close ng dalawa, di mapaglabanan ang alindog ni Tsubaki Sannomiya, kaya interesado rin ang lalaking ito. 3 araw at 3 gabi silang magkasama sa patuloy na pag-ibig. Saan kaya mapupunta itong incestuous love affair?