A mid-length novel game containing two stories. Pandora Diary — a story where Mikoto tells a “certain someone” about her sins, her loves and her vow, and “he” who atoned for those sins. Happy Birthday • Happy End — Several years after Matarou turns himself in, leaving behind Mikoto and Mitarou. Several years later, on April 27th, Mikoto and Mitarou hold a birthday party for Mikoto's birthday. In the meanwhile, the police are informed of an escaped inmate in the neighborhood... A fandisc of Mikoto Nikki.