Takarakuji de 3 oku-en atattanode himo bishoujo kai hajimemashita 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

I Won 300 Million Yen in a Lottery so I Started Raising a Freeloader Pretty Girl