NaruTsuna

NaruTsuna is a Het ship between Tsunade and Naruto in the Naruto series.

Canon
Naruto first meets Tsunade when traveling with Jiraiya to ask her to be Hokage. She initially rejects it saying only fools would become Hokage. This angers Naruto and he challenges her to a fight. He fails to use Rasengan during the fight and takes a challenge to learn it within a week.

In the fight with Orochimaru and Kabuto the later uses Tsunade fear of blood and tries to kill her but Naruto saves her defeating Kabuto with the Rasengan. Tsunade is able to overcome her fear of blood and aid him.

Fanon
It's a less common crack pairing.