At the start of the school year, the Winchesters, Cas, Jo, the Doctor, Donna, Jack, Sherlock, Anderson and Irene sit together at lunch. When they learn that those will be their assigned seats for the rest of the school year, some are sad, other ecstatic, but the bond formed is undeniable. Friendships intertwine. And those bonds are the first to notice that students are starting to disappear. At first it's just one student a month, and then more and more are gone one day. The group immediately thinks that this is the of Meg, the Master and Moriarty, a group of bullies at the school, but as they become more and more innocent, one of their own is taken and it's a rush to beat the clock to find those taken and discover why everyone is being taken and where they are.
Transmigrated into DxD World-Kuoh Town, Hibari Kyoya. an average student, spent 18 agonizing years in the world fully aware of the dangers, knowing he is utterly powerless in a world of gods and monsters, Until...
[Ding! Sign-In System loading... 20%... 50%... 80%... 100%.]
Destiny, it seems.. has a cruel sense of humor. A [Sign-In System], long overdue, finally bursts to life within him, offering a chance at survival, a chance at power...
[Ding! Congratulations! You have received the Rainbow-Grade Gift Bag!]
...
He then started completing System's tasks, accumulating even greater rewards.
[Ding! Task completed. Reward: Perfect Rumble-Rumble Fruit (Weakness to water Removed).]
[Ding! Task completed. Congratulations to the host for obtaining the Flying Thunder God Technique!]