Hifumi to Himitsu no Kankei ni Natteshimatta Hanashi - A story about getting into a secret relationship with Hifumi.

[Kazumiya (Arisu Kazumi)] Hifumi to Himitsu no Kankei ni Natteshimatta Hanashi - A story about getting into a secret relationship with Hifumi. (Blue Archive) [Digital]

[かずみ屋 (有栖かずみ)] ヒフミと秘密の関係になってしまった話 (ブルーアーカイブ) [DL版]