Osananajimi to Sefure ni Naru Hi

An R18 commercial manga single-chapter (単話) release by ワニマガジン社, distributed on DLsite Books. According to the listing, the story depicts one night in which a heroine, worn out, ends up staying over at her childhood friend’s home and the two move into a “sex friend” relationship. It is a Japanese-language release; the DLsite page lists no official English edition.

English-friendliness notes

This is a Japanese-only single-chapter release aimed at Japanese-reading readers — DLsite’s listing confirms no official English edition. The score reflects that language accessibility gap rather than any judgment of the story itself: understanding the dialogue and narration around the two leads’ relationship is likely to take Japanese reading ability. This entry is based only on the public DLsite Books listing and has not been confirmed by reading through the chapter.