That Time I Got Reincarnated as a Slime, Vol. 4 (manga) : The Ways of the Monster Nation

When a statue of Tempest’s leader, Rimuru, van­ishes from the school’s sculpture classroom, Ramiris is determined to find the thief herself. But while she’s on the case, the students decide to take a little action of their own by creating brand-new statues of Rimuru! Along the way, they’ll need some help from Framea, who’s all too eager to see some three-star craftsmanship!