Cinnamon Sugar Raised Happiness - S1.E6

Summer vacation is coming up, which means final exams to take. The student council is working hard on promoting the student festival and the preparations are going better than expected. The night before their last exam, Mika goes to Mutsuki's house with the pretense of studying, but they both end up going out and having fun all night long. At the end of the episode, it is shown that Mutsuki has joined the student council as the assistant.