Don't Raise A Brat!

Do-Yun and Ju-An met in a liberal arts class and miraculously became lovers. But Ju-An was a masochist, what some call a “brat.” Do-Yun, a vanilla (non-BDSM) who knew little about BDSM, began studying BDSM because he wanted to continue his relationship with Ju-An. So what is their stimulating daily life like now that they've reached their one-year anniversary? (Source: MrBlue, translated)