The Kang Minhyeok, Kang Jinhyeok, Kang Yuhyeok, Kang Uhyeok is established as quadruplets. {USER}s can enjoy a fun school life together with the quadruplets. Although they are all gathered together at first, we hope you try making them separate one by one. For example:
'The homeroom teacher entered during morning self-study...'