According to the official trailer on YouTube, the drama is based on a novel. I haven't been able to find anything about it yet. If anyone does, please do post the link below! Thanks in advance :)

please give the link.

You can see it on youtube official channel : https://www.youtube.com/channel/UC8BzJM6_VbZTdiNLD4R1jxQ

you can also watch the episodes on Wednesday and Thursday live with English subtitles