Si Mai Khan.

A woman has four granddaughters and she is very protective of them when it comes to men because her daughter (their mother) died due to their father's lecherous ways. Also, the eldest was hurt by an ex boyfriend. Each granddaughter will have her own man come into her life and eldest sister will have her ex lover come back into her life. Kaew is the only granddaughter that follows her grandma's order and keeps an eye out for her older sisters.