Looks like a reference to Hajimete no Otsukai, a TV show that features little kids going on their first errands alone.
Thanks. Added a TL note.
Today, there is a girl setting foot outside the Kure Naval Base for the first time. I'm moving out♪It's the four year old Shimakaze-chan who's good at footraces! She's the fastest in the whole naval base!*sprint*Kure Naval BaseWahhhhhhhhhh I wanna go homeeeeeeSo fast!
She gave up right on the entrance!! Too sloooow♪I'm counting on you.Today, she's on an errand to deliver some torpedoes to the neighborhood Shinkaisei-kan's house♪Will we see that running speed that's she's so proud of during this errand?