Spy no Tsuma

Manga adaptation of the movie Spy no Tsuma. Set in 1940, Yusaku (Issey Takahashi) runs a trading company in Kobe, Japan and he he is married to Satoko (Yu Aoi). While on a business trip in Manchuria, Yusaku learns of a horrific national secret. For the sake of justice, he decides to let the whole world know about his discovery. Satoko believes Yusaku, who is now accused of being a traitor. She swears to be with Yusaku no matter the consequences. (Source: AniList)