Yes. Their kiss is a big deal in the light novel. It shows how far their relationship has come from when they first met. It's not just a random act but a culmination of all the adventures they've had together, the trust they've built, and the feelings that have developed between them over time.
The plot generally revolves around Naofumi, who is summoned to a parallel world as one of the Four Cardinal Heroes. Raphtalia becomes his important companion. They face various challenges together, such as battles against powerful monsters and dealing with political intrigue in the new world.
In the light novel, Naofumi and Raphtalia have a complex relationship. At first, it's a master - servant relationship. But as the story progresses, they develop a deep emotional bond. Raphtalia becomes a very important figure in Naofumi's life, and they support each other through many difficulties.
Naofumi is initially distrustful due to his harsh experiences. He's strong - willed and has a sense of justice. For example, even when wrongly accused, he still tries to do what's right. Raphtalia, on the other hand, is loyal. She starts as a slave but grows into a strong and independent character who is always by Naofumi's side.