Kimi janakya Dame na Dorei Shoujo 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 protected a slave girl from another world. She wants to do everything for me, but she doesn't understand when I tell her that there are no slaves in modern Japan. The common sense and concern for each other is confusing, but an embarrassing and fun life living together begins in this cross-cultural romantic comedy! But, for her, why does it have to be me?