I Started Working a Housekeeping Job and Ended Up Being Liked by the Family of the Most Beautiful Girl in School.
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Kaji Daikou no Arubaito wo Hajimetara Gakuen Ichi no Bishoujo no Kazoku ni Kiniirarechaimashita.
(English translation: I Started Working a Housekeeping Job and Ended up Being Liked by the Family of the Most Beautiful Girl in School.)

Label: GA Bunko
Publisher: SB Creative
Author: Shiohon
Illustrator: Ell Akino
Volumes: 6
Official site: MAGCOMILinks: Amazon.jp
Synopsis: Harusho Ootsuki lost his parents when he was young, and his grandmother took him in and taught him housework and cooking. Harusho uses his skills to start a part-time job as a housekeeper during the summer vacation of his second year in high school. The story begins when his first client turns out to be the home of the most beautiful girl in school, Ayaka Tojo.
From making home-cooked meals that delight Ayaka, to going grocery shopping together like a newlywed couple, and even going on shy movie dates like young lovers, they begin to grow closer by spending these special moments outside of school. This charming and awkward housekeeping rom-com featuring the most innocent and beautiful girl in school and a secretly high-spec guy begins!
Why:
This is a up and coming LN series that's becoming quite popular. It's a really wonderful read that would be great in the J-Novel Heart series