The idea of tearing at one's face to remove an insect is extremely disturbing. It might involve a large, venomous or just really creepy - looking insect. For example, a giant centipede crawling on someone's face at night. The person, half - asleep and terrified, resorts to such a drastic measure without thinking clearly.
Scary stories can help us face fear by getting us used to the idea of being scared in a controlled way. It's like a practice that makes the real fear less overwhelming.
One challenge could be that the enemy is too powerful for Naruto to defeat on his own. He might have to quickly level up his skills or find allies to help him. For instance, he might need to convince some of the more reluctant ninja in the village to join him in the fight.
One challenge Naruto might face is dealing with the physical changes in the Kyuubi. Since it's a unique situation, he may not know how to properly support the Kyuubi during the pregnancy. Another challenge could be facing the judgment of the villagers. They may be afraid or not understand what's going on and turn against Naruto.
Kawaki might resist Naruto's teachings at first. Since he has his own way of doing things, adapting to Naruto's values and training methods could be difficult. Also, the village might not fully accept Kawaki right away, and Naruto would have to fight for Kawaki to be accepted, which is a big challenge.
One possible scenario is that the insect is actually a parasite that has been slowly taking over the person's mind. When they start tearing at their face, it's not just about getting rid of the physical insect but also trying to free themselves from the mental control. The more they tear, the more they realize that the situation is far worse than they initially thought. The story could be about their struggle against this unknown and terrifying force, with a lot of psychological and physical horror elements involved.
He might face internal conflict. Naruto has always been an open and honest person, so keeping such a big secret could go against his nature. This could lead to him struggling with his conscience. Also, he would need to balance his normal life with his secret Hokage duties without raising suspicion. For instance, he can't always disappear suddenly to attend to Hokage business without people getting curious.
Naruto will face numerous challenges. Politically, he has to navigate through the complex web of power - hungry nobles and bureaucrats who may not like an outsider, in a sense, becoming the heir. He'll have to learn about governance and diplomacy quickly. Socially, he has to deal with the different classes of people in the Fire Country, from the poor peasants to the rich merchants. And as a ninja, he still has to protect the village from threats while being in this new role.
Communication might be a big issue. Naruto comes from a world where people communicate in a certain way, and Moka is from a different, more supernatural - oriented culture. They may misunderstand each other's intentions or not be able to fully convey their thoughts. Also, if they are in a world that is not familiar to both of them, they would have to adapt quickly to the new environment while also dealing with their own personal differences.
He might become more withdrawn. The burned face could make him self - conscious, so he doesn't interact as freely as before. For example, he might avoid public gatherings or eye contact with people.