is a Japanese adult visual novel developed by Cube, a brand of Cuffs. It was originally released on September 30, 2011, for Microsoft Windows. Later, Alchemist ported the game without the erotic content to the PlayStation Portable. Your Diary will be released for the PlayStation 4 and PlayStation Vita. The story revolves around Tomoki Nagamine, who has feelings for an upperclassman named Sayuki Ayase. Upon receiving a diary from the library manager, he is informed by Yua that all of his happiest memories will be recorded in the diary.
The gameplay of Your Diary follows a branching plot line which offers pre-determined scenarios with courses of interaction, and focuses on the appeal of the four female main characters by the player character. The game ranked as the third best-selling bishōjo game at the time of its release. It received a manga adaptation which serialized in Hakusensha's Young Animal Island between volumes 19 and 24.
Gameplay
Your Diary is a romance visual novel in which the player assumes the role of Tomoki Nagamine. Much of its gameplay is spent reading the text that appears on the screen, which represents the story's narrative and dialogue. The text is accompanied by character sprites, which represent who Tomoki is talking to, over background art. Throughout the game, the player encounters CG artwork at certain points in the story, which take the place of the background art and character sprites. Your Diary follows a branching plot line with multiple endings, and depending on the decisions that the player makes during the game, the plot will progress in a specific direction.
There are four main plot lines in the original Windows release that the player will have the chance to experience, one for each of the heroines in the story. Throughout gameplay, the player is given multiple options to choose from, and text progression pauses at these points until a choice is made. Some decisions can lead the game to end prematurely and offer an alternative ending to the plot. To view all plot lines in their entirety, the player will have to replay the game multiple times and choose different choices to further the plot to an alternate direction. In adult versions of the game, there are scenes depicting Tomoki and a given heroine having sex.
Plot
Story
Tomoki Nagamine attempts to confess his love to an upperclassman named Sayuki Ayase; however, he does not succeed in doing so, being caught off by a sad expression on her face. In the meantime, he works alongside his crush Sayuki in the library committee. One day, after wandering into a seemingly-abandoned library, the library manager Misuzu gives Tomoki a diary called "Your Diary", telling him that the book chose him. A cute girl introducing herself as Yua—who is the goddess of happiness—comes bursting out of the book and informs Tomoki that all his happiest memories will be recorded in his diary. The story mostly revolves around Tomoki interacting with the four heroines (in later versions, seven) and eventually forming a romantic relationship with one.
Main characters
The protagonist and playable character of Your Diary. He has a crush on Sayuki but is unable to express his feelings for her. Tomoki works as a member in the library committee alongside her, in hopes of coming to understand her more. He is a generally serious person, yet he tends to be oblivious when it comes to love. Upon being given a diary, all of his happiest memories are to be written down.
Yua, the main heroine of Your Diary, is a bubbly and energetic girl who claims to be the goddess of happiness. Despite being a deity, she doesn't seem to have any special powers. She has a somewhat childish demeanor which causes her to be teased by other characters. Yua gets along with most people because of her carefree attitude and cheerfulness.
Being the eldest member of the library committee, she acts like a big sister to everyone else, to Yua in particular. Graceful and smart, Sayuki is the object of Tomoki's affections. Tomoki was unable to confess to her when seeing her sad expression which leads to him joining the library committee. Sayuki has a mysterious aura and seems to bear some secrets of her own.
The childhood friend of Tomoki who lives above the café she works at part-time. Her mother died a few years ago so she works with her father to keep the family business running. Yūhi is talented at cooking and her homemade dessert is very popular. Like Sayuki, she has secret feelings for Tomoki, but she hides these feelings and often acts tsundere towards him.