A new bookstore has opened at the end of East Street with a very special name—the Monster Study Room. The owner of the study room is a monster who has slept from the Republican era to the present, with a quirky temper and a mischievously cunning personality that seems immortal. To adapt to modern life, he hired a life assistant. The assistant is actually the male lead, with good looks but poor handwriting, a cold sense of humor, and a tendency to avoid talking unless necessary. When he does speak, he aims to "poison" his boss with just one sentence. So, this story is "toxic." The assistant is the bottom, and the boss is the top, in a 1V1, happily-ever-after, light and everyday urban fantasy.