Although Kirito cleared SAO and returned to his real life, his adventure was far from over. Kirito found that Asuna was in a coma in the hospital. Meanwhile, Nobuyuki Sugou of RECTO, the company that took over SAO property, tries to get married to Asuna while she is in a coma. Hearing that Asuna has been spotted in the virtual game called Alfheim Online (ALO), Kirito decides to dive into the virtual world once again. With the help of Leafa, Kirito rushes to the World Tree where Asuna is supposedly imprisoned.