I Sekai de Mattari Kodomo Shokudou Hajimemasu! ~Raara wa Min'na no ousensei~

Synopsis

"I'm not Yumeka... I'm Lala Fiaro..." Ihara Yumeka has always felt lonely eating dinner alone while her parents are busy. Yumeka loves children, and while working as a kindergarten teacher, she also volunteers at a children's cafeteria on weekdays. One day, a suspicious individual breaks into the kindergarten. Yumeka steps up to protect the children, but is stabbed in the back with a kitchen knife... When Yumeka wakes up, she has become a blonde girl named Lala Fiaro!? https://www.cmoa.jp/title/316021/