The Future Diary

The Future Diary watch order runs the full 26-episode series alongside three OVA chapters, and the correct order isn't purely numerical. Begin with the standalone prologue OVA listed first, which sets the survival-game stakes, then move into the main series, episodes 1–26, following Yukiteru and Yuno through the deadly diary-holder battle royale. After the series finale, watch the ten-part OVA continuation, and close with the final single OVA epilogue. Slotting the opening OVA before episode 1 and saving the two later OVAs for after the finale keeps the mystery and its resolution in the intended sequence. This is the complete Mirai Nikki anime in one pass — series plus every OVA — so horror and psychological-thriller fans get the whole story, including the aftermath the TV run leaves hanging, without hunting for scattered extras elsewhere.