Tonari no Kuderella o Amayakashitara, Uchi no Aikagi o Watasu Koto ni Natta

Katagiri Naomi, a high school student who lived alone for two years, meets a beautiful girl with black hair and blue eyes, who moves into the apartment next door. The girl's name is Yui. It seemed that she really was a noblewoman, and her nickname was "Quderella" because of her nonchalant attitude at school. Naomi knows that Yui doesn't want to depend on others, but she's actually quite naive, so Naomi decides to help her.