The Grade 5B Case Files Steam Charts, Sales, Players & Wishlists

Open the notebook and explore seemingly ordinary yet mysterious incidents together with two girls!

Watsonia, a student in Grade 5, Class B at Seashell Elementary School, buys a notebook at a stationery store. At the time, she has no idea what she wants to write in it—she simply finds the cover cute and decides to buy it. This notebook becomes the starting point that brings Watsonia and her classmate Holmlyn together as a team of two, investigating and deducing unusual incidents hidden within daily school life.

To others, these incidents may seem like something trivial caused by children. But for Holmlyn and Watsonia, each one of them is a difficult “case” .

As the mysteries unfold one by one, a larger picture of life in school gradually emerges.With Holmlyn, who is a detailed-oriented and action-driven person, and Watsonia acting as her “assistant” who carefully records every clue, the two work together to uncover the truth behind each case. Along the way, classmates, teachers, and students from other grades all make their appearances, forming a fair-play mystery story set within the school.

As the player, you will collect clues, conduct investigations, think things through, and make correct deductions alongside them. Watsonia records all clues in her notebook—if you ever feel lost, try opening it and taking another look.

Watsonia:

A cheerful and innocent elementary school girl in Grade 5, Class B at Seashell Elementary School. She’s neither particularly noticeable nor invisible—just an ordinary student. She enjoys buying things she personally finds cute, though her taste isn’t always mainstream.

Holmlyn:

A quiet and reserved elementary school girl in Grade 5, Class B at Seashell Elementary School. She doesn’t have any especially close friends in class.

She is passionate about origami crafts and also has an interest in sprinting.

The game features a linear, chapter-based narrative structure, with seemingly ordinary incidents gradually forming a complete story.

• The game consists of 5 chapters, each taking about 1 hour to complete.

• Chapter 1 is released for free and offers a complete standalone story experience.

• Chapters 2–3 will be released simultaneously as DLC.

• Chapters 4–5 will be released later as DLC following the earlier chapters.

As the chapters progress, the story will gradually unfold.

This title also serves as the starting point of a series. Future works set in the same theme and setting are planned.
The series is expected to consist of multiple titles, each containing around five chapters, continuing to record mysteries hidden within everyday life.

• Press Shift to open the menu during dialogue or free investigation where you can check items or save game

• Press Z or Enter to confirm or investigate

• Press X or Esc to cancel or close the menu

• Press S to fast-forward

• Press Q or scroll to view the log

• Press F5 to quickly return to the title screen

• Use ↑↓←→ to move the character in explorable scenes

Scenario & Programming: Teacher Li（狸老师）

Art: 坐标zahyou

Publisher: Eternal Dream Studio

(Referenced materials are listed in the in-game credits)