Love Shuffle

AKA
ラブシャッフル

Episodes: 10
Broadcaster: TBS

Summary
Usami Kei is a salaryman who has risen in status due to his engagement with Mei, the wealthy daughter of his company's president. Shortly after she breaks off the engagement, a power failure leaves him stuck in the elevator of his apartment building. Trapped with him are three others living on the same floor - Airu, a trilingual interpreter, Ojiro, a model photographer, and Masato, a psychiatrist. While waiting, their conversation hits upon their love lives and the question of whether there is truly only one fated partner for everyone. As a result, they decide to try "shuffling" their relationships with each other.

(source: DramaWiki)

Cast
Tamaki Hiroshi as Usami Kei
Karina as Aizawa Airu
Matsuda Shota as Sera Ojiro
DAIGO as Oishi Yukichi
Yoshitaka Yuriko as Hayakawa Kairi
Kojima Hijiri as Kamijyo Reiko
Kanjiya Shihori as Kagawa Mei
Tanihara Shosuke as Kikuta Masato