1: Heartbroken

As you all already know about other stories of Issei being betrayed, this time after Everyone gets angry at Issei for Not telling his feelings to Rias in The Dance, so he runs away.

Issei ask Ddraig to transform him back to human, and when he was transforming back into human, The the Evil Pieces Exploded, creating a shockwave that got the attention of All Demons, Devils, Fallen Angels, Monsters, and Gods.

Now he has bigger problems.