Kaito Ruby

Toru Hayashi is an unremarkable bachelor who lives with his mother, until one day a young woman named Rumi moves in in the apartment upstairs. Rumi is a self-proclaimed master thief, but she needs socially awkward Toru's help to actually kickstart her so-called career.

Taisaku Akino

Detective

Manami Fuji

Apartment Housewife

Kyoko Koizumi

Rumi Kato

Hiroyuki Sanada

Toru Hayashi

Hiroko Isayama

Old Woman at Toru's Company

Takanori Jinnai

Rumi's Friend

Nana Kinomi

Apartment Tenant

Kumi Mizuno

Toru's Mother

Akira Nagoya

Man in White Cloth

Masumi Okada

Apartment Tenant

Kōen Okumura

Apartment Manager

Haruhiko Saitô

Jewelry Store Clerk

Hideko Yoshida

Bank Clerk

Hideyuki Otsuki

Banker

Kazuo Kato

Toru's Boss

Hideyo Amamoto

Grocery Store Owner

Kyôko Takami

Woman on Her Way Home from Shopping

Shinichiro Uchida

Postman