Another World’s Health Method with Two Months Left to Live is a Manga/Manhwa/Manhua in english language, COMEDY series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Meet Kaichi Takemura, aged 82. Owner of the Takemure Dojo and master of the Churyu Akai-Jutsu martial arts, he is now wheelchair-ridden due to severe lung cancer. He is estimated to only have two months left to live. Realizing his time on this earth is ending, Takemura creates a bucket list of things he wants to do before then, which he shares with his nurse Tokiko Tanaka. However, one day his illness flares up, and Tanaka wheels him to the nearest doctor as fast as she can. When he comes to, he finds that the two of them aren’t in the emergency room of the hospital. In fact, it doesn’t seem like they’re in Japan at all…