After the death of her parents, the mansion and almost all of the family possessions were taken away as collateral when she was already at rock bottom. However, memories of her previous life come back to her, and she is able to find a job as a maid, showing a strength of mind that is unbelievable for a former nobleman's daughter. But what worries her more than anything else is... the unhealthily plump body of the master of the marquis's house where she works and his niece! Cicilia, who has a past life history of poor health, decides to put her modern health knowledge to use and guide the two aristocrats to good health!