The base for this romance hentai Kateikyoushi no Onee-san 2 part 1 was an erotic game by Atelier Kaguya and the anime story has started when dad of young guy Touya must go left for his business trip. He did not want to leave his son alone. So he found 4 home tutors for the son. There are 4 gorgeous and very sexy women – Rio, Nagisa, Amane and Sara. In the second part of Kateikyoushi no Onee-san these hot ladies continue to teach Touya live lessons not only by books.