5/5は桃ちゃんのお誕生日！
今年は4話OVAタイチョウ・ウォー！に出てきたこの姿
戦車ー！いっぱーつ！
桃ちゃんお誕生日おめでとう！

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Source: post #7774741
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May 5th is Momo-chan's birthday.
This outfit is from the OVA of episode 4, Commander War.
Tanksー! One moreー!
Happy Birthday, Momo-chan!