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

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

Synopsis

Hinako Konohana is the perfect young lady—graceful, elegant, and flawless... or so everyone thinks. Behind closed doors, she's a total disaster who can't handle basic chores! When ordinary student Itsuki Tomonari becomes her caretaker, he's thrown into 24/7 damage control, maintaining her "perfect" image. It's awkward, nonstop chaos—but it starts softening into something that feels like love... (Source: Crunchyroll)