The Eerie Sacrifice of a 'LEECH'

If you were given a chance to have a job, will you take it?
if you were given a job by a rich family, will you take advantage of it?
A certain poor boy was given the opportunity to become the butler of a wealthy woman. Life was ordinary and uneventful, until 'that day.' Suddenly, the boy's intentions took a drastic turn. The question is: why did he change? His life had been normal up until now... so, why?