How Does 'DxD Transfer Student' Differ From The Original DxD?

A new world with nearly unlimited possibilities. A system, classes, magic, skills and monsters. Sounds exciting? But for Jin it didn't go quite as he expected nor was there a princess or a Goddess to welcome him to this new world, his only hope was the system he received. Left alone in the darkness, How will he survive when he wasn't human in the first place?

Cent, short for Maleficent, recently found out that she is the daughter of the great demon Beelzebub when she got a pair of horns on her eighteenth birthday instead of a pair of skating shoes. She finally got her answer why she never once felt that she belonged, turns out, she is not entirely human. When her estranged dad came knocking to take her away from her wretched foster life, Cent grabs the opportunity to be with her only ‘living’ family. But, he is called the great demon for a reason. After disturbing her life, he drops her like a sack of potatoes in front of the gloomy gates of Transylvania Academy. She realized that before her great demon dad can accept her, she still needs to prove herself worthy. Does she have what it takes to carry the privilege as an only child of a great demon? Does she have what it takes to be a monster?

Al, was thrown into another world for no apparent reason. A new world filled with magical things. However, this wasn't the first time he had been reincarnated. He thought he was just an ordinary youth, but it turned out that his identity was so extraordinary in his first reincarnation. There were his harems still waiting for his arrival. Will he meet them soon and what will happen?

A 25 years old boy named John is suddenly shot by his friend, which results in his death, but is reincarnated again as the new Demon King. Unfortunately, he agains dies in a battle. This time also he is reincarnated but as a human. Follow Vis' adventure as he gets revenge, becomes a demon and makes his own harem.

Evy was a simple-minded girl. If there's work she's there. Evy is a known workaholic. She works day and night, dedicating each of her waking hours to her jobs and making sure that she reaches the deadline. On the day of her birthday, her body gave up and she died alone from exhaustion. Upon receiving the chance of a new life, she was reincarnated as the daughter of the Duke of Polvaros and acquired the prose of living a comfortable life ahead of her. Only she doesn't want that. She wants to work. Even if it's being a maid, a hired killer, or an adventurer. She will do it. The only thing wrong with Evy is that she has no concept of reincarnation or being isekaid. In her head, she was kidnapped to a faraway land… stranded in a place far away from Japan. So she has to learn things as she goes with as little knowledge as anyone else. Having no sense of ever knowing that she was living in fantasy nor knowing the destruction that lies ahead in the future. Evy will do her best to live the life she wanted and surprise a couple of people on the way. Unbeknownst to her, all her actions will make a ripple. Whether they be for the better or worse.... Evy has no clue.

Issei changed from his old self to the new him, its a semi-NTR at the start meaning Rias etc doesn't have s*x with their new boyfriend. After Issei went missing Rias etc started to realize what have they done and regretting their action but when they reunited once more Issei is not the same as he used to be, a pervert lucky go around changed to the badass Issei now. Lori will be traveling to different worlds to meet new girls, the 1st girl is Mukathri, then Sinech, Jalter, and Jeanne.