rnThe man's name is ``Kareki Tsunetaka.''rnHe is a veteran home guard with twenty years of service.rnThe residence is guarded by Tsunetaka. rn Shoko Katsuragi, a widow with a voluptuous body who remarried his father, and her sister ``Sayaka'', who steals the attention of men with her stepchild, rn rnHis younger sister ``Yuki'', who is cheeky but has a well-proportioned body, is now present. rnFrom his intuition as a home security guard, Tsuneko figured out that Shoko was plotting to take over the Kareki family. r n In order to protect his irreplaceable home, Tsuneko sets his sights on his mother, Shoko, who is the mastermind, and r n several times.