The love between Sans and Chara in the comic is quite interesting. It could be a forbidden love, a friendship that blossoms into something more, or a love that faces many challenges. The way it's depicted adds depth to the story.
Comic relief basically means having humorous parts in a story that's otherwise serious. It helps prevent the plot from being too intense all the time. For example, in a drama about war, a funny scene between soldiers could be comic relief.
It typically has charming characters, fun adventures, and teaches valuable lessons. The art style is cute and appealing, making it very enjoyable for kids. Also, it often incorporates elements of magic and friendship to keep the plot exciting.
Well, Big Bang Theory is a comedy series about a group of scientists and their lives. Kiss Cartoon is a platform for various cartoons. As far as I know, they don't have a specific or inherent relationship. They operate in completely different domains.