Explain costume play heart in simple terms. Cosplay involves dressing up and pretending to be a specific character from a manga. This trend has become a massive trend among fans of nerd culture internationally. People meticulously craft costumes and props to accurately portray their favorite characters. Costume players often attend gatherings or cosplay events, where they can display their creativity and network with others who share the same passion. In the end, costume play is an manifestation of admiration and dedication for a fictional character and the love for the geek community.