Orochimaru had spent the day doing preliminary research on a Jutsu he was considering creating to forestall the worst. He hadn't really gotten anywhere however, and was feeling somewhat frustrated. Jiraiya had told him just that morning that things would come to him if he just relaxed once in a while, and had invited him to go out drinking with him and his no longer so little minion.
After an evening at the bar in which he had somehow gotten roped into a drinking contest with Jiraiya who naturally won since he regularly drank like a fish, the young Namikaze dragged his teacher off, leaving him to stumble home alone. He couldn't be seen in this state however. What would the villagers think? What would Sarutobi-sensei think? He was the responsible one, not the one that went out and got completely smashed. He'd just have to transform himself and hope nobody noticed...
It had been somewhat petty of him to choose the form of Jiraiya's minion. He didn't care if people saw "Minato" like this however. Maybe Sarutobi-sensei wouldn't bring the boy's name up again when mentioning potential successors for when he chose to retire. That was all good as far as he was concerned.
"Minato-kun!" yelled a certain red head whom he noticed smelled strongly of alcohol as she plowed into him and dragged him into the bushes before making out with him.
Now that he thought about it, Uzumaki Kushina was a rather attractive woman. He wouldn't mind finding out exactly what it was that Jiraiya's minion saw in her...
9 Months later:
"Honey, why does our baby have black hair and yellow eyes?" Yondaime Hokage Namikaze Minato asked when he saw his newborn son for the first time.