When it comes to idol group Cham Jam, Eripiyo is the oldest — and perhaps only — fan of Maina Ichii. Through thick and thin, the dead heat of summer, torrential rain, and freezing snow, Eripiyo has been there to show her love for Maina. But when Maina gets injured during a concert, her determination to push through for the sake of her group both inspires and worries Eripiyo. How can she support her favorite idol while encouraging her to rest for her own sake?

Meanwhile, Cham Jam is putting their all into growing their fanbase — between collab events and breaking into videoblogging, the behind-the-scenes peek into their lives inspires a trip down memory lane. Yumeri considers how her feelings toward her idol career have grown and changed, while Maki worries that people from her past will come back to haunt her. A chance encounter between Maina and another fan results in a new realization that she needs to speak up more for herself. But maintaining the fine balance of their private lives and idol personas is harder than it seems...