Data xx Transitory is the thirteenth and bonus episode of the DRAMAtical Murder animation. It features all of the bad endings from the original game. (Source: DRAMAtical Murder Wiki)

After his business goes bankrupt, 30-something Kyung-Min (Oh Jung-Se) kills his wife impulsively. Hiding his anger, he seeks out his former middle school classmate Jong-Suk (Yang Ik-June). Jong-Suk now works as a ghostwriter for an autobiography, but he dreams of writing his own novel. For the first time in 15 years, they meet. Kyung-Min and Jong-Suk both hide their own current situations and begin to talk about their middle school days. At their middle school, they were classified by their wealth and grades. Kyung-Min and Jong-Suk were at the bottom. They were called pigs. They were bullied by a ruling class called dogs. When they were called pigs, they got angry but couldn't do anything against the dogs. Then a king of pigs appears—Chul (Kim Hye-Na). Kyung-Min and Jong-Suk became to rely on Chul-Yi. Now, leading Jong-Suk to their middle school grounds, Kyung-Min discloses the shocking truth to Jong-Suk of what happened 15 years ago. (Source: Asian Media Wiki)

Since the beginning of Earth's history, angels from the planet Eden have been carefully monitoring the behavior of its inhabitants, whom they call Earthians. Chihaya and Kagetsuya are two agents sent from Eden to assess the positive and negative aspects of the Earthians' nature. Despite the orders Chihaya was given by his home planet, he frequently ends up entangled in Earthian affairs, much to Kagetsuya's annoyance. Meanwhile, as Chihaya tries to understand the origin of his strange black wings, he uncovers one mystery after another.

On Christmas Eve, Hiro Hirono runs into Miyako Miyamura, a frivolous girl who borrows his bicycle in order to chase down a purse thief. After Hiro finds his bicycle wrecked and Miyako unconscious, the two unexpectedly spend their Christmas Eve together, and when they discover they go to the same high school, their accidental relationship develops even further. This sparks the jealousy of Hiro's childhood friend Kei Shindou, whose pure approach to life catches the eye of Kyosuke Tsutsumi, a womanizing photographer searching for the perfect shot. Elsewhere, Renji Asou, a boy who dreams of being a girl's knight in shining armor, has a chance encounter with Kei's twin sister—the overly shy Chihiro Shindou, who spends her time reading alone—at an abandoned train station. The two quickly become friends and eventually decide to write a novel together. However, when Renji discovers Chihiro's secret, his childish ideals are put to the test. Guided by two mysterious adults, these youths' relationships intertwine in a heart-rending tale of love, rejection, acceptance, and memories.