The Grade 5B Case Files game cover

The Grade 5B Case Files CD Key

Two girls Watsen and Homu team up at Seashell Elementary, Grade 5, Class B to investigate incidents hidden in school life. A notebook records clues as you gather evidence, deducing each case across five chapters in a linear narrative. Chapter 1 is free; chapters 2–5 DLC. Starts a mystery series.
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Release Date

26 Jul, 2026

Publisher/Developer

狸老师工作室, Eternal Dream

Reviews

Steam: 90.85% positive (129/142)
Metacritic: -

The Grade 5B Case Files Steam Price History Chart

Current Steam price: FREE
Lowest Steam price ever: FREE — 2026-10-19 — Current low
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The Grade 5B Case Files description

The Grade 5B Case Files

Open a notebook and step into a world where ordinary school life hides extraordinary puzzles. Watsen, a cheerful Grade 5 student from Seashell Elementary, buys a cute notebook on impulse, and this small moment sparks a partnership with her classmate Homu. Together, they become a two‑person investigative team, unraveling mysterious incidents tucked within the everyday corridors of school.

What looks like simple childhood trouble slowly reveals a larger picture of life in Grade 5‑B. With Homu’s sharp mind and decisive actions guiding the way, and Watsen dutifully recording every clue as her capable assistant, the two navigate each case by collecting evidence, analyzing clues, and drawing conclusions. Each mystery is a stepping stone toward a richer understanding of their world and their classmates.

The game unfolds in a linear, chapter‑based narrative spanning five chapters. Chapter 1 is released for free as a complete standalone adventure. Chapters 2 and 3 come as a bundled DLC, followed by Chapters 4 and 5 in a later DLC release. As the chapters progress, the scope expands and new characters—teachers, classmates, and students from other grades—enter the investigation, weaving a larger mystery through the school.

Gameplay centers on exploration, clue gathering, and careful deduction. Players control Watsen and Homu through explorable scenes, examine environments for hidden details, and use the notebook to catalog clues and organize findings. If you ever feel stuck, the notebook serves as a built‑in reference to revisit evidence and rethink theories.

Characters break the mold of typical school life. Watsen is a lively, ordinary girl who loves cute things and brings a positive energy to every investigation. Homu is quiet and thoughtful, with a passion for origami and a talent for sprinting. Their complementary personalities create a dynamic partnership that drives each case forward and deepens the story as clues accumulate.

The Grade 5B Case Files is designed as the starting point of a larger series. Future titles in the same world will continue to explore mysteries hidden in everyday life, with each installment featuring around five chapters and new adventures within the same school setting.

Controls at a glance: Press Q to open the menu and check items or save; Z or Enter to confirm or investigate; X or Esc to cancel or close the menu; F5 to return quickly to the title screen; use the arrow keys to move in explorable scenes.