Shikaku was working overtime in his office, dealing with the fallout of the Invasion and the Sandaime's death, when Inoichi informed that there was a rumor circulating about him having an illegitimate son.

He quickly made his way home dumping all his work, in hopes of getting Yoshino to believe that it wasn't true. However, on his way, he was stopped by his son and another Nara boy who was a few years older than Shikamaru. Looking at Shikamaru's guilty expression, he deduced what had happened.

"You're the one that started the rumor." he accused.

"Hai." He said, guiltily. "In my defense, I couldn't exactly claim him as my son." He pointed towards the other boy who was looking at them with an amused expression.

"Explain." he ordered, with gears of mind already in motion.

Shikamaru turned towards the boy who was most probably his son and gestured him to speak.

"I am Nara Shikadai. I got lost in the Nara forest 25 years from now and an old deer decided to send me back in time." he explained.

Shikaku pinched the bridge of his nose. "Troublesome." he turned towards Shikamaru. "You're explaining this to Yoshioka."

Shikamaru opened his mouth, most likely to refuse, when Shikadai interrupted him. "I'll do it. Grandma has a soft spot for me."

Shikaku nodded as Shikamaru sent him a glare for sacrificing his son, who was older than him.

They entered the house to come face to face with a angry Yoshino.

"Nara Shikaku, explain yourself." she shouted and pointed towards Shikadai. "Is he your son?"

His grandson, who apparently had balls of steel, waved at Yoshino, "Hi, baa-chan."

"What did you call me?" Yoshino roared at his face.

He just smiled and answered, "I am Shikadai, your grandson from the future."

Yoshino's demeanor took a 180 degree turn. "You're Shikamaru's son. Why didn't you say that before? You're too skinny. Do you like dango?" She took out some from the cabinet. "Here have some. Shikaku, Shikamaru, help me in the kitchen. I want to prepare the perfect dinner for my grandson."

Shikaku shared a glance with his son, and proceeded to the kitchen. Shikadai wasn't kidding about the soft spot.

Some time later, they were all sitting at the dining table, eating and young Shikadai was having fun making them look bad my complimenting Yoshino every two minutes.

"Such a sweet boy. Your mother has clearly taught you good manners. I forgot to ask, who is she?" Yoshino asked.

Shikadai sheepishly rubbed the back of his head, before answering, "Subaku no Temari."

Yoshino gasped, "The Sand kunoichi?"

This didn't surprise Shikaku that much as he already knew that the color of Shikadai's eyes belonged only to those with the Kazekage's bloodline. This, at least, gave hope for better relations with Suna in future."

"Hai." Shikadai answered. "Konoha and Suna have a good relationship in future, especially after the 4th Shinobi War."

That raised Shikaku's hackles.

Apparently, Shikadai had seen him tense up and addressed him. "My old man often made me work at the Hokage archives to skive off work. I can give you a lot of information that would at least make the war a lot less damaging than it was the first time."

"So, it's not avoidable?" he asked.

His grandson shook his head.

"Not at the table." Yoshino interrupted, looking pale. "You can talk in Shikaku's study later."

This was quickly followed by a quick agreement of "Hai, baa-chan."

Later, that night, going through his notes of events leading up to the 4th Shinobi War, courtesy of Shikadai, Shikaku's thoughts could be expressed in one word.

Troublesome.