Всезнайка Мэйсаку!

Once upon a time, there was a prestigious school called "Ryugu Elementary School" that produced many famous characters. One day, an ordinary boy named "Matsuda Meisaku" entered Ryugu Elementary School. Will he be able to graduate from the school as a masterpiece character, surrounded by a lot of strong characters such as 'Sweets' who is super stupid and high-tension, 'Musubi' who gets mad when people call him 'Onigiri', 'Nokio' who is a narcissist and calls himself a robot, and 'Bolt' who is obviously faster than a rabbit? (Source: Anime News Network, with tweaks by Ryuto Setsujin)