The 'engage kiss light novel' often has unique character development. It might introduce interesting relationships between the characters. For example, the way the characters interact in a romantic or tense situation can be really engaging.
I'm not entirely sure as I haven't read every detail of it, but generally in such light novels, there is often a male protagonist who is at the center of the story. He might be an ordinary guy at first glance but has some special qualities.
It's not appropriate at all. Such stories often contain sexual overtones which can make people around feel uncomfortable and can also have a negative impact on the social environment, especially in public or family - friendly settings.
This is a very private and often culturally sensitive matter. In some relationships where both partners are comfortable and consensual, they may explore various forms of physical intimacy. However, it's not something that should be publicly flaunted or judged without understanding the context of the relationship.
To engage with DC Comics, you might try exploring their various characters' solo series. Follow their story arcs and get to know their backstories. And don't forget to check out the crossover events for a more epic experience.