|Spoiler Alert: This article or section contains details about plotlines not covered in the anime. Do not proceed unless you wish to be spoiled. |
Cold hand, Warm heart is the fourth Material Edition of the Sword Art Online series. Kawahara Reki published it under his pen name Kunori Fumio. It was sold at COMITIA 86 on November 16, 2008. The story features Kirito and Asuna being afflicted by an unidentified negative status.
After a hunting day, Kirito returned to his house in Algade. Feeling strange and thinking that he was afflicted by a new negative status, he decided to call Klein for help. With a blurry vision, he typed a desperate message, falling unconscious in his bed after sending it. When he awoke hours later, Kirito was surprised to have been taken care of by Asuna instead of Klein, realizing that he had sent the message to the wrong person. The girl explained to him that his real body had simply caught a cold.
Much to her surprise, Asuna awoke with the same condition as Kirito the next day. As the latter was nowhere to be found in the room, Asuna assumed that he had gone training. Thus she was surprised when he suddenly appeared, holding a basin with ice that he had acquired by going to 58th Floor and beating its field boss. For the rest of the day Kirito took care of Asuna, with her joking that she did not mind exchanging the cold once again.
- In the Web Novel version 58th Floor was the location of West Mountain.