Mina, who is very shy and fragile girl has been sold to a very quite yet short-tempered and aggressive vampire, Tzuyu.

After a messy court battle for her only child's custody, recently divorced Minatozaki Sana moves back to Japan. Instead of going back to her hometown, she decides it is best for her child to grow up in the unassuming city of Kyoto. There, she encounters her estranged best friend Hirai Momo. Penniless and without a degree, damaged good Sana (as some people call her) faces the harsh reality of becoming a single parent.

Dahyun and Nayeon were pretty close... until a particular news about them came out and ever since that day Nayeon's treatment towards Dahyun changed...