File:Sword Art Online 4-Koma Vol 1 Cover.png

Summary
Source: http://www.amazon.co.jp/gp/product/4048869051/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=247&creative=1211&creativeASIN=4048869051&linkCode=as2&tag=dengekibunko04-22