Gray vanished suddenly, and Natsu was the last to be around him. Now, the dragon slayer will do whatever it takes to get his best friend back, no matter the cost. However, no one realizes that Gray is closer than what they thought.

Natsu Dragneel is a unique child, the offspring of a red dragon and a human. While he presents as human most of the time, sometimes for short periods, Natsu finds himself in the body of a dragon. One such afternoon he sneaks off in pursuit of a scent that seems to be inviting him to follow - leading him to Gray Fullbuster, a young boy whose whole life has recently been turned upside down by a red dragon. A friendship between the two boys soon blossoms and a bond is forged that can't easily be broken. Faced with many obstacles, Natsu and Gray will have to fight to ensure their love is strong enough to surpass a hatred borne of tragedy. * The cover is temporary until the art is released. Updates every other week.

Gray has a bitemark that his fellow guildmates notice, and they decide to find the culprit. Read to find out. Repost from AO3