Tenants on the Fourth Floor

I, Chen Dingyi, feel that all the bad luck in my life happened this summer. There was a murder in the house I just rented! I met Tang Feng, who was annoying again. His words were incoherent and he always teased me! Murder cases occur one after another in the shared building. Who is the murderer? What's the purpose? I turned out to be the biggest suspect! What to do? !