"Utsuro’s diary" is a horror game based on the concept of exchanging diaries with a hollow girl. As the protagonist, the player becomes a girl's friend, confronting her inner darkness while unraveling the mystery of her creepy diary. The stage is school life that is common at school. Dark rooms, dimly lit corridors, and eerie music and sound effects add tension to the player. The game progresses in the form of an exchange diary. The protagonist can obtain her girl's diary and send her his own diary. The contents of the diary are written about the girl's depressive symptoms, her internal conflicts, and experiences of strange phenomena. Depending on the player's choices and actions, the girl's state and the progress of the story will change. Mysteries and codes are hidden in the girl's diary, and the player will face the terrifying truth, such as the existence of the girl's trauma. The ending branches depending on the player's choices and actions, and the girl's fate and the player's own fate are affected. Also, certain choices and behaviors may cause players to suffer from depression themselves. [Effect of the game] Psychological Horror: Over the course of the exchange diary, details about the girl's depression and eerie events will be revealed. The player can feel tension and anxiety by touching the darkness of the girl's heart. As the story progresses, the player himself feels a connection with the girl, and the fear increases as he gets involved in spooky events. The excitement of solving mysteries: The story progresses by solving the mysteries and codes hidden in the diary. Players collect information, deduce and decipher it, and work on solving the mystery. Every time you solve a mystery, you can experience the joy and excitement of getting closer to the truth of the story. Importance of Choices: Your choices and actions affect how the story unfolds and ends. Right choices can help a girl or change her own destiny, but wrong choices and actions can have dire consequences. The importance of such choices keeps the player in suspense and interest. Spooky Environments and Sound Effects: The ruins and dark locations in which the game takes place create an eerie atmosphere. Dim lights and shadows, spooky music and sound effects add tension to the player. Environmental descriptions and sound effects immerse players in the game world with trepidation and terror. Player-Girl Bond: As the protagonist, the player becomes the girl's friend and interacts with her emotions and state. Through her diary exchanges, you can feel empathy and a desire to protect her while witnessing her changes and growth. This emotional bond enhances story progression and player excitement. The player will be able to get close to the girl and enter her inner world, and be forced to make choices that affect her destiny, bringing more realism and involvement to the story. Curiosity about Mysterious Events: The diaries describe spooky events and supernatural phenomena. Players develop an interest and curiosity about those mysteries and inexplicable events, and the pursuit of the truth enhances the appeal of the game. The quest for unsolved mysteries draws the player into the depths of the story. Suspenseful Storytelling: The game offers dramatic storytelling. The tension and curiosity builds as the girl's past and the mysteries surrounding her are revealed. Story developments and plot surprises keep players engaged and excited about what's next. [Recommended for those who know the following works] "Doki Doki Literature Club!" "Nightshade" "Hatoful Boyfriend" "Amnesia: Memories" "Fatal Frame" (Zero series) "Silent Hill" (Silent Hill series) "Catherine" "Rule of Rose" "Saya no Uta" "The Witch's House" "The Crooked Man" "Parasite Eve" "Sweet Fuse: At Your Side" "Tokyo Dark"