Vol2/Chapter01/Some Memories Are Meant To Stay Hidden

Summary
Natsu arrives at Sabertooth to have their mage  search Natsu's mind for memories of Zeref.

Natsu shows Rufus a picture of Zeref that was drawn by Reedus, Fairy Tail's pict mage. The memory-make mage searches Natsu's memories. He is able to see Zeref one more time, arguing with Igneel when Natsu was very young. He tried to continue past that point but is stopped by a wall he can't breach.

Rufus tells Natsu that his memories have been tampered with and it probably means that there is something in those memories that someone doesn't want him to know.

Natsu asks Sting if he has any memories before and he replies that he mostly remembers feelings as he was too young to remember much of anything.

Natsu tries to get Sting to open up about his feelings for Rogue but the White Dragon Slayer is reluctant to do so preferring to discuss his actions during Tartaros.

Natsu accuses him of almost getting his son killed and Sting explains that he thought Rogue had been going after Tiamat on his own and panicked. He admits he owes Kai a great debt that he hopes to repay someday. Natsu sees his regret and forgives him. He thanks Sting for everything he did to help him when he needed him and Sting replies that they are brothers.

Rogue enters the office and they discuss the dragons. Natsu says he was confused about the fact that they had both claimed to kill their dragons. Rogue says that they thought that they had, they had very clear memories of doing so. Sting added that Weisslogia and had admitted to tampering with their memories with Rogue adding that they had done so against Igneel's wishes. This leads Natsu to think that Igneel had already altered his memories and it must have gone badly.

Rogue is surprised to hear that Natsu's memories had been altered and suggests that maybe someone else had done it. Natsu tells Rogue about Zeref and how only his memories before Igneel seem to be affected. The dragons were capable of altering memories and Igneel was his dragon so the mostly like case is that he did it himself, although Natsu has no idea why.

Natsu leaves Sabertooth to go meet Gray and Silver at Lamia Scale.