Summer Lesson's new waifu is pretty cute, but the deluxe price isn't

Chisato Shinjo has finally been unveiled as the next heroine in Summer Lesson. She lives in an old mansion which you'll venture to in order to teach her about the outside world including modern society and even manga, computers, and video games.

Chisato is apparently very sheltered and thus is quite selfish, which according the to creators will lead to "more surprising experiences and mysterious feelings than ever before." Mysterious feelings...I'm not sure I'm ready for that.