The two other stories in The Wings, "Encounters and Departures" and "Deathly Child", are not quite as stark, but they are similarly dark and uneasy. They involve socially alienated individuals, sexual passions and obsessions, and the questioning of sexual mores. It's powerful stuff, and three stories in this vein are probably as much as one can take in a single hit.
A brief biographical paragraph is the only commentary in this collection. Yi Sang died of tuberculosis in 1937, aged only 27, while imprisoned in Tokyo on charges of "thought offense" — and apparently these stories are built out of autobiographical components, which doesn't suggest a happy life! Yi Sang may have been influenced by the writings of the European avant garde, but his stories charted a different landscape.