A silent greeting manga is appealing because it challenges the conventional way of storytelling. It forces you to pay close attention to details and rely on your imagination. Plus, it can offer a peaceful and introspective reading experience.
The appeal lies in its ability to evoke deep feelings through simple visuals. It can make you think and interpret in your own way. Also, the art style might be very captivating.
It's got a unique charm. Maybe it's the way it conveys emotions without words or the mystery it creates.