Mochizuki-san Chi no Yankee

When their mother passed away, the Mochizuki family's eldest daughter Yuka tried to take care of her father and siblings as best she could, but her cooking was simply catastrophically bad. After her father stumbles by chance upon a boy who made an incredible bento, he proceeds to ask him to come to their home as a housekeeper. However, that person turned out to be Kuraku, the blonde-haired delinquent in Yuka's class!

(Source: Kodansha, translated)