The story features a team of four sleuthing sisters.


Cast
* Kaho as Sasamoto Yuriko (17)
* Nakagoshi Noriko as Sasamoto Mari (24)
* Kato Natsuki as Sasamoto Ayako (21)
* Ichikawa Yui as Sasamoto Tamami (19)
* Muroi Shigeru as Miyamoto Kazuyo (45)
* Namase Katsuhisa as Jonouchi Hideki (45)
* Takenaka Naoto as Sasamoto Shuhei (49)
* Yoshizawa Hisashi
* Kondo Yoshimasa as Misaki Taro (45)
* Hino Yojin as Yamada Kunio (48)
* Hara Fumina

Guests
* Masu Takeshi
* Kazama Toru as Ando Kenji (37) (ep1)
* Wakabayashi Shiho (ep1)
* Watabe Aya as Mizuguchi Junko (24) (ep1)
* Ueno Natsuhi as Kanda Hatsue (26) (ep1)
* Oshima Satoko as Konishi Kiyoko (ep2)
* Yasui Kenichiro as Konishi Aichi (21) (ep2)
* Maeda Aki as Shiratori Sanae (19) (ep2)
* Aimoto Kumiko Shiratori Kimiyo (45) (ep2)
* Matsuo Tomouchi as Onuma Kengo (50) (ep2)
* Kawashima Naomi as Hamada Masako (40) (ep2)
* David Ito as Takaoka Kensuke (33) (ep2)
* Umemiya Masako as Hara Tomoko (24) (ep2)
* Azuma Terumi as Onoda Kunuko (48) (ep3)
* Hasegawa Hatsunori as Nishizaki Atsuo (49) (ep3)
* Saito Shota as Onoda Shuichi (24) (ep3)
* Mayuko as Yamagata Setsuko (26) (ep3)
* Okada Kaoru as Kamiya Noriko (26) (ep3)
* Maeda Ai as Morita Akane (24) (ep3)
* Sone Yuta as Yazawa Koichi (42) (ep3)
* Matsuzawa Kazuyuki as Horie Kin (ep4)
* Nonami Maho as Horie Ryoko (ep4)
* Nakamura Shigeyuki as Kinoshita Norio (ep4)
* Tachibana Misato as Kinoshita Nobuko (ep4)
* Yamada Meikyo as Murota Katsuhiko (ep4)
* Ozawa Maju as Murota Haruyo (ep4)
* Tachihara Mai as Uchiyama Midori (ep4)
* Nakajima Hiroko as Murai Satoko (ep4)
* Miyaji Mao (ep7)