[Machine Translation] Apollo's voice that I remembered. When I meet someone I like, I want to watch fireworks together and confess my love. The summer camp version of the great sensation! Four fireworks in summer. Late at night, alone in bed, your voice was the only thing that saved me. I want to talk to you again. I have something to say. Arisu Yamabuki, a sophomore in high school, was looking for a girl named "Apollo," a radio broadcaster whose face and real name she did not know. One day, however, Arisu finds a clue about Apollo in the broadcasting club of the high school she is going to. There she finds four beautiful girls who dream of "working in the voice business"! The members of the broadcasting club are in high spirits before the summer camp at the seaside. Nene has to avoid a red mark on her final exam, Iko and Rokka have to choose a swimsuit to show to Yamabuki, and Shinobu has a hard time deciding which hotel room to stay in. Their feelings for each other heat up intensely as they prepare for the fireworks display on the last night of the camp..! Under the sun and starry sky, the girls are in love at full risk of their youth in this success romantic comedy!