"Furiten-kun" is a comedic anime series centered around the life of a high school student named Furiten, whose real name is never revealed. The protagonist is an avid mahjong player, but his skills are notably poor, earning him the nickname "Furiten," a term in mahjong referring to a player who cannot win due to a self-imposed restriction. Despite his lack of talent, Furiten is deeply passionate about the game and frequently finds himself in humorous and often absurd situations as he attempts to improve his skills and compete with others.

The narrative unfolds in a slice-of-life format, with each episode presenting standalone stories that highlight Furiten's misadventures in both mahjong and his daily life. His interactions with classmates, rivals, and occasional strangers often lead to comedic misunderstandings and over-the-top scenarios. Furiten's overconfidence and tendency to overestimate his abilities frequently result in his downfall, yet his persistence and enthusiasm remain undeterred.

Supporting characters include Furiten's classmates, who serve as foils to his antics, and various mahjong opponents who challenge him in both casual and competitive settings. These characters often embody exaggerated traits, adding to the series' comedic tone. The anime does not delve deeply into character development or complex plotlines, instead focusing on delivering lighthearted humor through its episodic structure.

The series incorporates elements of mahjong culture, with references to strategies, terminology, and the social dynamics of the game. However, prior knowledge of mahjong is not necessary to enjoy the show, as the humor primarily stems from Furiten's personality and the absurdity of his situations. The anime balances its comedic focus with occasional moments of camaraderie and self-awareness, though these are secondary to the primary goal of entertainment through humor.

Overall, "Furiten-kun" is a straightforward, episodic comedy that uses mahjong as a backdrop for its protagonist's humorous struggles and interactions, appealing to viewers seeking light-hearted and relatable content.