As Izuku leads Momo into her tank garage he thinks about the struggle to get this done in time. He had worked with Momo's parents and a museum on the other side of the world to complete this project. He had traded Momo's scans of his more obscure tanks for the right to scan a one of a kind vehicle he knew she would like.
"Alright Momo, under the sheet is your surprise." Izuku says and Momo immediately hurries forward to uncover the hidden tank.
"You didn't." Momo says, nearly collapsing in shock at the sight of the tank.
"I did, was it worth the effort?" Izuku asks.
"Yes! This is the best tank I have ever seen and the best birthday gift I have ever received." Momo says with an abundance of enthusiasm. "Well? What are you waiting for! Let's get to the range and fire this!"
"On my way." Izuku says.
"Have they forgotten us?" Ochako asks.
"Only Momo, that cannon is just what she always wanted." Tsu replies.
"Well, we might as well follow them in the CV-33." Ochako says after a pause, not really wanting to miss that gun being fired either.
With an ear-splitting bang the massive gun fires, the whole tank shifting rearwards slightly due to the recoil.
"Oh." was Momo's only response.
"Hey Izuku, what is it?" Ochako shouts from the gunner's seat of the comparatively tiny CV-33.
"Fighting Vehicle 4005 Stage II, a prototype firing platform for the absolutely ridiculous Ordinance, Quick-firing 183 mm L4 Tank Gun." Izuku says, "Basically a Centurion hull with a big metal box of a turret to hold an absolutely massive gun."
"183 mm?" Tsu comments in shock.
"Yes, the shell and charge are about as long as you are tall." Izuku says. "The gun weighs more than that tankette and it's ammo more than both of you combined."
"So, if you weren't here with your quirk, only I could load it?" Ochako asks.
"It's two part ammo so it's not that bad, but if you wanted to get a decent amount of shots, yes only you could load it." Izuku explains.
"Did the project go anywhere?" Tsu asks, but before Izuku could answer Ochako was nearly thrown off the tankette as the massive gun fired again.
"Momo!" Izuku shouts, "a bit of warning please."
"I couldn't resist." Momo responds breathlessly.
"Anyway, to answer Tsu's question, it didn't lead to anything. In the end more practical guns were made that used shell velocity and more modern ammo to take down armor, instead of brute force and high explosives." Izuku answers. "Only one of these even exists, and it's been sitting as a gate guard for longer than is really healthy, even for a tank."
"It's still an interesting machine." Tsu says.
"It is, and it's cannon is clearly very popular." Izuku responds before Momo shouts "Fire in the hole" and the gun proceeds to obliterate the hill at the far end of the firing range.
AN: Don't know what to give a girl? How about a cannon, they love cannons.
Anyway, I was thinking about what to write, and thought, why not give a tank as a gift, and then I looked to see if any characters had a birthday soon, and there was Momo, on the 23rd. I usually wouldn't bother with real birthdays let alone fictional ones, but this was an opportunity I could not let pass.
And now, with this month ending what better a bonus than this:
The peace of the lawns in front of 1-A's dorm was broken by a rather groovy tune that left everyone feeling better. As the nearby students turned to see where it was coming from they saw something they should never have to see.
A tall bipedal digitigrade walker was dancing a sort of congo to the music with it's cockpit open, revealing a familiar green haired student and his usual partner in shenanigans, a white haired child with a small horn. Both were dancing to the music even as the walker danced along, cannon arms waving and joints straining.
After the strange duo passed, Kyoka asks. "Was that Izuku and Eri dancing to September in a walker?"
"That was a Goliath from Starcraft and yes." Nejire answers.
P.S. This was inspired by the Youtube video #SEPTEMBER, and it's wonderful dancing skelly boy. Also September doesn't end until I go to sleep.