Robot maker, Kronos Heaven, finally develops "Night Tenjō", the perfect male humanoid programmed to be devoted and completely loyal to his lover. The company chooses temp worker Riko Izawa to take part in a five-day free trial. At first, Riko only sees Night as a household appliance. But when she finds out how deep Night's devotion to herself is, Riko finds herself falling in love with him. Joining the love triangle is Sōshi Asamoto, a distinguished young executive at her company who has feelings for her.
Mokomichi Hayami
Hiro Mizushima
Saki Aibu
Eisuke Sasai
Natsuhi Ueno
Kenta Satoi
Komoto Maki
Kaji Masaki
Sakuragi Ryosuke
Watanuki Shoichi
Tsubaki Nekoze
Meikyo Yamada
Rie Minemura
Erena
Jingi Irie
Kei Yamamoto
Shunsuke Nakamura
Kuranosuke Sasaki
Miki Maya