Is there any other story similar to this where the mc is actually a child and not a grown ...

https://www.mangago.me/read-manga/your_castle_s_little_helper/

https://www.mangago.me/read-manga/rozi_in_the_labyrinth/

https://www.mangago.me/people/tag/298354/NON+YAOI+CUTIE+PIE+SHIT/

https://www.mangago.me/read-manga/a_secretly_capable_child_is_seeking_for_her_dad/

https://www.mangago.me/home/mangalist/3302262/

https://www.mangago.me/read-manga/my_mom_entered_a_contract_marriage_bored_corona_kids_version/

https://www.mangago.me/read-manga/on_the_way_to_meet_mom/

https://www.mangago.me/read-manga/on_the_way_to_meet_mom/

https://www.mangago.me/read-manga/pawprints_on_her_heart/