Naoki Kashida has been transfer to Tatsumi Port to finish his studies. Little he knew that the town was under an anomaly called "The Dark hour" and shadows were attacking the people. "So I have to save the world again? What a pain..."
When Lissana died, he couldn't believe it. So he grabbed a ship and sail to where she was last been seen. The storm detroyed his ship and everyone thought he died. 2 years has passed since that day and a dragon slayer has returned home. (Smarter/stronger Natsu. Not a harem perse but multi)