Best Fairy Doctor is a Manga/Manhwa/Manhua in english language, Action 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

When I asked my master why he wants me to study medicine? He said "Because you can't find a wife normally these days, if you have these skills, you can get into touch contact with girls" I mean what a pervert, right? But I too am a pervert, as I usually peek at my Senior sister while she takes bath. But I am also a Gentlemen who treats girls with care, that's why they call me A Gentleman Pervert. In this way, I learned superb medical skills and came to city to find a wife...if possible a Harem?