Does anyone know what anime (comic) this is?

Sword Art Online Doujinshi

Sword Art Online is a TV animation "Sword Art Online" adapted from the masterpiece of Japanese writer Reki Kawahara, and is produced by A-1 Pictures. It tells the story of a death game that is about to begin. SAO player Kirito aims to completely conquer the game and embarks on a series of harsh adventures in the game stage Aincrad Castle.

Doujinshi: The word "doujin" comes from the Japanese "どうじん", which originally refers to people and hobbies who have the same ambitions. It is a term used in animation culture, which refers to "self-created, self-created without commercial influence", or "independent" creation. It has a greater degree of creative freedom than commercial creation, and the flavor of "creating whatever you want to create". Doujinshi is a self-made publication of this kind of creation. This sector is called the "doujin community". This term comes from the Japanese "doujinshi" (どうじんし), which refers to a group of fans who come together to create and publish books and publications. Although the so-called doujinshi originally did not specifically limit the goals of creation, For ordinary people, the most common use of this term is to refer to comics or peripheral creations related to comics.