Over the inheritance of their stepfather Tokujiro, Kei and Kyujirou (brother-in-law) clash with Hibiki and Kyoichiro (brother-in-law). Hibiki, who has been taking care of Tokujiro in the countryside all this time, tries to seduce him under the pretense of caregiving to keep the inheritance. Kei, discovering this, also decides she can't back down as a woman and starts to seduce Tokujiro herself. How will the heated caregiving battle between these beautiful women end...
