Weeks and even months after recovering from the SARS-CoV-2 infection, clinically more severe cases are being reported, which are suggestive of COVID-19- related multisystemic inflammatory syndromes (MIS). Firstly on March 2020, this condition was reported to be COVID-19 related to children (MIS-C). Since June 2020, a syndrome similar to multisystem inflammatory syndrome in adults (MIS-A) came to be noticed in adults as well. We reported here a case of 24-year-old young woman who had gone to a hospital with abdominal pain and later developed a severe cough, followed by development of subconjunctival bleeding, pericardial effusion, pleural effusion, and intra-abdominal fluid that we deemed them to be acute multisystemic clinical symptoms, 47 days after she had undergone a COVID-19 infection of mild clinical severity. It should be kept in mind that a multisystemic inflammatory syndrome along with a delayed immune response during COVID-19 disease can be seen not only in children but also in young adults, and seemingly severe clinical and laboratory findings can improve by controlling the inflammatory process.