"Instruct the child of a good family in various academic subjects." ~ Cube
Olive takes time to help the countess' son in his studies. The job not only pays well but it helps her learn moral lessons of her own, become a better person and get along well with children. However, it's taxing to tutor someone for long. The long stays also take a toll on her appearance over time, and she needs to prepare her lessons well too or she won't educate the boy adequately.
There are few upsides to this job. It's quite stressful and it doesn't raise morality any better than church work. The Charisma drain is a problem, since it starts being important for quite a few things by age 14, such as working efficiently in its rival job. While the pay is good, it's not much higher than some jobs. Salon work has the same base pay at age 11 while being significantly less stressful and draining a less important stat.
What it's useful for, is getting a few endings where Morality is greater than Faith. Even then, it's likely more efficient to just use science classes for draining faith and combine it with church work, unless you don't have the money. Lastly, this is the only other job to raise maternal instinct, but it's usually better just to use babysitting early on to raise it.
Really it's only good for the Hero endings. For these endings, Sensitivity has to be higher than Faith and Intelligence, and her morals have to be high.
Starting Pay: 20G
First Raise: 24G
Second Raise: 29G
Third Raise: 35G
Fourth Raise: 42G
Maternal Instinct: Approx. +0.5/day