The boys experience their first school festival with all the fun, games, and food, courtesy of Masami, who is intent on winning the cooking contest. But her dreams are put on hold as Ryuko Saito appears and influences everyone to attend a biology symposium. Not only that, she intends to enter the cooking contest herself! Gawl in the meantime enters a fishing contest of his own with a mysterious character.

As the guys search the lab for more clues on how to stop Ryuko, Natsume struggles with her existence and purpose, and writes a letter to the guys. Meanwhile, Masami is looking forward to the guys' return to the apartments by cooking up a feast.