That was my first time to go to any anime - related convention , so imagine my surprise when I got there and people were dressed up in full cosplay attire , while I was in : T - shirt , shorts and slippers . LOLz . And it was more of the " I just decided to put on clothes today , because ca n't just leave this house naked " kind of shirt and shorts ... whereas everyone else had nice clothes on .
According to the above context, choose the best option to answer the following question.
Question: What is the atmosphere at an anime convention where many dress in cos - play ?
Options:
- None of the above choices .
 - An anime convention with many people in cos - play outfits has a frivolous atmosphere .
 - An anime convention with many people in cos - play outfits has a buttoned - down , corporate atmosphere .
 - An anime convention with many people in cos - play outfits has a playful atmosphere .


An anime convention with many people in cos - play outfits has a playful atmosphere .