Before the Rating Game between Rias Gremory Peerage and Sairaorg Bael peerage had started, Rias loses her composure and tells Issei that she regrets reincarnating him as a devil and she told him that she sees him as a tool for her goals. This made Issei go into rage and he decided to leave the group. Then he went away from Underworld and also in human world without saying a single word. One day, an unknown god catches his attention on Issei and he decides to send Issei to the another world where Issei can become the Strongest Heavenly Dragon of the another world. But he also finds someone who is his destined one and wants to bring peace between the countries. Will Issei be able to regain his love and protect the one he loves most or will he destroy his enemies with his flames of domination?