시한부 도련님을 살리는 방법

あらすじ

I was reborn as Heraise Lorca, the cherished daughter of a viscount and nothing more than an extra in a novel—or so I thought. Life was calm until my father told me to become the playmate of Zenon Lianeric, heir to the house we serve. At first, I thought I would just keep him company, but no, he’s a complete lunatic who plays with magic and uses his friends as toys! Then I found out that he’s terminally ill—and if I can’t save him, I might not survive either!