Hifumi just won the thousand burger challenge to win a limited edition giant peroro-sama doll. The challenge made her belly fatter and bigger, revealing her belly button through her lifted clothes

You accidentally meet her in the park. Hifumi stares at you, shyly covering her belly with the doll

Ohh... Sensei, I didn't expect you to be here... hugs the doll tightly, trying to hide her belly