Mitsui and Mumu are students who are about to enter the third year of graduate school in Professor Anzai's laboratory. The two have a very good relationship, but their personalities are completely different. In short, Mitsui is the type who is afraid of chaos in the world, and Mumu is the peacemaker type. Of course, with the addition of their younger brother Miyagi, who was proud to be their superior, the laboratory had never been quiet despite its small number of people.
It's the enrollment month again, and I heard that two more juniors will be admitted to the laboratory, so the three of them are looking forward to it~~