"The Leonard & Penny Story In Full (S1-12) | Big Bang Theory" is an article that recounts the complete story of Leonard and Penny, two main characters from the hit sitcom "Big Bang Theory." In this English article, I will provide a summarized version of the content within 400 words while preserving the main idea.

The article delves into the intricate relationship between Leonard and Penny, tracing their evolution from the first season to the show's finale. Leonard Hofstadter, a brilliant but socially awkward physicist, becomes infatuated with Penny, the aspiring actress who lives across the hall.

In the early seasons, Leonard struggles to build a romantic connection with Penny while she dates other men. However, their friendship deepens, allowing Leonard to support Penny during challenging times. Eventually, Penny realizes her affection for Leonard, and the pair begins dating, marking a major turning point in the series.

In summary, "The Leonard & Penny Story In Full (S1-12) | Big Bang Theory" recounts the evolving relationship between Leonard and Penny throughout the twelve seasons of the beloved sitcom. 

It highlights their initial friendship, the romantic obstacles they overcome, their engagement, and their eventual reconciliation on the subject of having children. The article provides a concise and comprehensive account of their heartfelt story, capturing the essence of their enduring love.