Harukaze no Snegurochka佇めるスネグラチカ(仮); 春風のスネグラチカ; 春风的雪女; Harukaze no Snegurka; Harukaze no Sunegurachika; Shunpuu no Snegurka; Shunpuu no Snegurochka; Snegurochka of the Spring Breeze; Tatazumeru Snegurochka; The Loitering Snow Maiden

From MangaHelpers: Set in the Soviet Union, the mysterious girl named Belka and the quiet boy Shchenok help a Socialist Party member to escape from the secret police. Their aim is to infiltrate into a certain mansion that holds what they seek, but the secret police immediately capture the two. Will they be able to find what they seek and endure the torture of the secret police? [DrCoke]