Mystery solving

Black-and-white Japanese manga. Narrow horizontal slit eyes, lids close together, pupils small dots. Clean thick contours, large round heads, about four heads tall. Hair and figure shadows are black planes. Dark flat tone covers the picture; only the lit face side is white. Backgrounds are few straight edges and dark planes. Tense. No text, speech balloons, panel borders, signatures or watermarks. Subject: A boy and girl fall silent over a blank scrap of paper in an archive at dusk. Short hair and a short bob, plain tops. Show faces and hands chest-up and a shelf edge.

Black-and-white Japanese manga. Narrow horizontal slit eyes, lids close together, pupils small dots. Clean thick contours, large round heads, about four heads tall. Hair and figure shadows are black planes. Dark flat tone covers the picture; only the lit face side is white. Backgrounds are few straight edges and dark planes. Tense. No text, speech balloons, panel borders, signatures or watermarks. Subject: A boy holding a small blank scrap of paper looks back at an old building entrance. Short hair, a plain top, trousers and trainers. Show his whole figure from head to feet and the doorway edge.