Saijo no Osewa: Takane no Hanadarake na Meimonkou de, Gakuin Ichi no Ojousama (Seikatsu Nouryoku Kaimu) wo Kagenagara Osewa suru Koto ni Narimashita

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)