Isekai Kuimetsu no Same

Synopsis:

Everyone Laughed at Shiromi, Until She Summoned a Shark-Fueled Nightmare! Shiromi Lovecut-Toothrough was labeled the worst summoner in the world—until the day she called forth Sharkiller, a monstrous being that transforms into the most terrifying sharks straight out of Hollywood’s wildest B-movies. Now, the jokes have stopped… and the screaming has started! With a bloodthirsty summon that’s always hungry for chaos, Shiromi suddenly finds herself as the realm’s last hope (or its biggest threat). Can she take down the Demon King and bring peace to the land? Or will Sharkiller turn the entire world into his personal feeding frenzy? A darkly hilarious fantasy romp where one girl’s "terrible" magic might be exactly what the world needs or fears most!