Isekai Papa Katsu Oji-sa is a Manga/Manhwa/Manhua in english language, ROMANCE 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

Takumi is a cheat reincarnate who visits a magical city in another world. His purpose is ...... "I want to play with young girls!"　Takumi, who was strong enough to slay a dragon, retired as an adventurer out of fear for his life. His next ambition is to live as a "daddy's uncle. With the help of a good elf, Lolibaba, and his amassed wealth, he is steadily attracting young girls, but this is a different world. Monsters appear on his dates, he gets lost in dungeons ......, and even his daddy's life is on the line!　The adventurous drama filled with love, excitement, and sexiness by a former S-class adventurer, "Papa Katsudo Uncle," begins now...