Another plot idea could be that there is a competition of sorts between the two worlds. Naruko represents her world and Vemon represents its world. They compete in a series of challenges that test their strength, intelligence, and adaptability. As they compete, they start to understand each other better and even develop a romantic relationship. This could also involve some cultural exchanges as they learn about each other's backgrounds and the different rules and values of their respective worlds.
One good source could be FanFiction.net. There are often various crossovers in their database. You can search for 'naruko lemon vemon crossover' and browse through the results. Some might focus on unique plotlines where the characters from both universes interact in unexpected ways, like teaming up to face a common enemy or getting to know each other's cultures.
The 'Last Man Comic Girl' could potentially be about a girl who finds herself alone in a dystopian future and has to face various challenges and uncover hidden secrets to survive and restore order. It might also focus on her relationships and personal growth as the last hope in a desolate world.
Grantism in political cartoons is usually a way to visually represent and analyze political phenomena associated with a particular entity or concept. It could involve satire, caricature, or symbolic depictions to drive home its message.