Vol1/Chapter11/Outburst

Summary
Natsu is finally allowed to leave the infirmary and join the others in the guild hall. He feels uncomfortable and anxious as he sits with his team. He asks Gray to spar with him but the ice mage refuses not wanting to fight with a pregnant Natsu.

Natsu is disappointed but quickly realizes that it's probably for the best because he is still having a lot of conflicting feelings about his friend. He becomes frustrated and takes it upon himself to start a fight with Gajeel to get his mind off of all his thoughts.

Gajeel attempts to keep control of himself pointing out that Natsu is still recovering. This causes Natsu to become even angrier, he launches himself at Gajeel. When Gajeel attempts to retaliate he is stopped by one of Gray's Ice Shields.

Both dragon slayers are confused by this turn of events. Gajeel even more so when Gray places himself in front of Natsu protectively. He yells at Gajeel for fighting Natsu in his condition. The Iron Dragon Slayer has no idea what Gray is referring to since as far as he knows Natsu is mostly healed at this point and he is not aware of any other condition. He notices other people's reactions and decides to back off as there is clearly something going on that he is not aware of.

When Natsu sees Gray in front of him, he assumes that the ice mage now thinks that he is weak and he feels hurt. That feeds his anger even further causing him to lash out at Gray in the worst way possible. He tells Gray that the last time he had relied on him for protection, the ice mage had almost killed him referring to the events that happened during his captivity.

Happy slaps him for his outburst while Erza demands that he apologize to Gray at once. Both are well aware of how difficult Natsu's abduction and captivity were for Gray and they are outraged at Natsu's accusations.

Natsu calms down after Happy's slap and looks at Gray's expression only to realize that instead of making the ice mage angry like he wanted he has gone too far and tapped into Gray's guilt and self-hatred. Gray offers to let Natsu retaliate against him for all the things his doppelaganger did.

Natsu desperately tries to think of a way to salvage his mistake but before he can say anything all three men are summoned to the guild master's office.