A 3 chapter long short story that takes place just days after Saiyans Curse. This story is indeed named after the 2 part OVA about Levi's backstory in the Attack On Titan anime called A Choice with No Regrets.

Ghosts Of The Past

The pouring rain. The thick fog. The sound of pounding hooves. And then, two voices.

?: "Don't die, ok?"

? 2: "Make sure you come back, Big Bro!"

He left the voices. And when he returned... A Titan had...

CRASH!

Levi screamed out loud as he sprang up from his bed in a daze! Thunder died as he panted, his whole body sweating. Only once his heart stopped pounding within his chest so violently did he finally realize that it had been a nightmare. He only sighed as he rubbed his face.

Levi: "*Sigh...* ... Not again..."

Another flash of lightning and another crack of thunder. The storm outside raged on like it has for the last few days now. Levi never liked storms... Not after one in particular. Poor Levi just stared out the window of his room and watched the rain pound against the glass and the world outside light up with every bolt of lightning. Yet another sleepless night, he thought. Not because of the storm, but because of the nightmares that have been plaguing him for the last four days now. Three days ago, Toushiro was wished back after sacrificing himself to save Trunks from Coge. The day after his death, everyone worked together to find the seven magic Dragon Balls to bring him back. But even though Toushiro was now back and everything was back to normal, for Levi... Toushiro's death really triggered something. It triggered the memories and emotions of a past event. Only those who knew Levi back in the day know what happened. He had two close friends during his thug days back in their old world. Farlan Church had been with Levi for many many years back then. They knew each other so well that they rarely had to communicate what needed to be done in times of action. Isabel Magnolia was a sweet girl who had the tenacity and drive of any man. She looked up to Levi and often called him Big Bro. They were his closest friends who followed him everywhere. When they were forced to join the Survey Corps, Levi wanted to get back at Erwin badly for his humiliation and to secure some documents related to a job. During their first expedition outside the wall, a heavy rain storm came in. Levi made a choice to leave his friends behind and go find Erwin to settle a score. That choice... He has regretted ever since as it cost Isabel and Farlan their lives. Since then he's never gotten close to anyone until Toushiro and Vegeta found him. Toushiro's death nearly destroyed Levi, just like Farlan and Isabel's deaths almost broke him. The rain and thunder continued on as Levi quietly sobbed in his hand.

Levi: "... I'm so sorry..."

Morning. The storm was gone for now, but more appeared to be on the way. For Levi, it had indeed been another sleepless night. Every night he was plagued by the same nightmare and every night he woke up in a sweating frenzy. Those who knew him were starting to take notice of his declining health. Eren has tried to talk to him, but the only answer the teen has gotten was that it was because of the storms. But Eren knew this wasn't the case. So he asked those who might be able to help.

Hange: "Interesting. It started right after Toushiro's death?"

Mike: "He's never liked storms. He always got a little antsy around them."

Eren: "Yeah but I don't think the storms are all to blame here."

Erwin: "I think it has something to do with when he first came to the Survey Corps. He came with two others, Farlan Church and Isabel Magnolia. They were his closest friends, I rarely saw them apart."

Eren: "Really? Where are they now?"

Erwin: "Sadly they both died during their first expedition. Levi was so distraught and filled with so much grief that their deaths nearly destroyed him. Since then he hasn't really bonded closely with anyone."

Eren: "That actually would explain a few things. ... I feel so sorry for the Captain now..."

While Eren did his own investigating, another took a more direct approach. When night came, the storms returned. And so did the nightmares.

Levi: "No... No don't..."

Levi clenched the sheets tightly as he quivered in bed. The nightmare playing before him was the exact moment when he last saw Farlan and Isabel alive. He saw himself, but couldn't do anything.

Levi: "Don't leave them..."

He saw himself leave Farlan and Isabel.

Levi: "Don't go... Don't leave them!..."

Then a new scene played. He saw Toushiro rushing to Trunks' rescue.

Levi: "No, Toushiro!..."

Then the moment he dreaded. Coge killed Toushiro with his own zanpakuto.

Levi: "NOOO!"

The soldier quickly sat up! Once again his heart raced, he was drenched with sweat, and he panted heavily. Thunder rolled by as he slowly calmed down. But then, he noticed he wasn't alone. Somebody was in his room, where they stood quietly.

Levi: "... Vegeta..."

The saiyan prince stood quietly in Levi's room, watching him with silent eyes.

Levi: "How did?..."

Vegeta: "... Jimmying locks is a lost art nowadays."

Levi looked away, ashamed that the great saiyan was seeing him like this.

Vegeta: "Levi... You can talk to me about whatever's troubling you... You know that right?"

Levi: "... Yeah..."

The saiyan calmly walked over and sat down next to the soldier.

Vegeta: "So... Start talking."

Levi looked at Vegeta before glancing out the window and watch the rain patter against the glass. A low rumble could be heard on occasion, the storm clearly not as violent as it has been for the last few days. The guilt and the sadness were apparent within his eyes. The soldier then turned back to his saiyan friend. Vegeta smiled softly to reassure Levi, and the sound of the rain concealed the emotional outflow. The next day and Eren was at Squad 10 with Vegeta, Goku and Piccolo standing there. Goku and Piccolo have gotten word of Levi's nightmares and came to see what they could do.

Eren: "Commander Erwin told me that Captain Levi might be having nightmares because of-"

Vegeta: "The loss of his two friends, Farlan and Isabel."

Eren: "... How did?..."

Vegeta: "I asked him myself."

Eren: "... Why do I even bother?"

Goku: "Gosh... I feel so sorry for Levi. It must've been hard."

Eren: "Is there anything we can do?"

Goku: "Hmm... There might be."

Vegeta: "I'm just guessing here but what you have in mind wouldn't happen to be round, orange, and seven of them together summons a giant dragon that grants wishes, would it?"

Goku: "Wow! You got it on the first guess, Vegeta. How'd you know?"

Vegeta: "Ohh like we weren't gonna cross that road eventually."

Piccolo: "He's gotta point."

Eren: "Are you guys talking about the dragon balls?"

Goku: "Yep!"

Eren: "But we just used them. Don't we have to wait a whole year to look for them again?"

Goku: "Not necessarily."

Piccolo: "There's another set of dragon balls we can use. The original ones on Planet Namek."

Eren: "You mean the home planet of your kind, Piccolo? Will they work?"

Piccolo: "And then some. You see, Eren, the Namekian dragon balls are slightly different from ours. One is that instead of two wishes, we get three with these. And the other added bonus is that Porunga, the Namekian Dragon, is much more powerful than Shenron. He can bring back a person however many times you want unlike Shenron."

Vegeta: "And the extra power means we have a little more flexibility in what we can do."

Eren: "But will it work? I mean we're talking about bringing people back to life in another worldly dimension. Is that even possible?"

Goku: "Well we're gonna find out!"

Eren just stared at Goku with a shocked look.

Piccolo: "I think he was expecting a different answer than that, Goku."

Vegeta: "Agreed. Eren. Leave this to us. You just make sure Levi doesn't find out or get worse, ok?"

Eren: "Sure."

Goku: "Alright then. Off to Planet Namek."