Lock Up: Warera Akatsuki Puroresu-dan

"Akatsuki" is the first ray of light emerging from pure darkness. "Samson" Takaki is the ace wrestler and company president of the Akatsuki Pro Wrestling group. Samson has devoted his body and soul to his wrestling career. Now, Samson not only has to endure the bodily damages caused by his long wrestling career, but he has to face prostate cancer. However, this doesn't deter Samson. He continues his fight to bring joy and entertainment to his fans.

(Source: MangaHelpers)