Rich Girl Caretaker: I'm Secretly the Caregiver of the Most Popular Girl in This Rich Kid School

Also known as: Saijo no Osewa: Takane no Hanadarake na Meimonkou de, Gakuin Ichi no Ojou-sama (Seikatsu Nouryoku Kaimu) wo Kagenagara Osewa suru Koto ni Narimashita, 才女のお世話 高嶺の花だらけな名門校で、学院一のお嬢様(生活能力皆無)を陰ながらお世話することになりました, 才女的侍從 在滿是高嶺之花的貴族學校暗中照顧（毫無生活自理能力的）學院第一大小姐

by Yuusaku Sakaishi

A poor high school boy, Itsuki Tomonari, got caught up in a kidnapping attempt on Hinako Konohana, a young lady from one of Japan's largest conglomerates. On the surface, Hinako appears to be a brilliant and beautiful young woman, but in reality, she is a lazy girl with no life skills. However, due to family reasons, Hinako has to play the role of the "perfect young lady" at school. Wanting to protect her, Itsuki took on the job of caring for her. Eventually, Hinako began to spoil Itsuki with all her might -- "I don't want...... Itsuki to leave my side right now." This is a love story that begins beyond the master-servant relationship featuring a princess with a beautiful facade. (Source: HJ Bunko, translated)