Being a Mama is Super Tough! Unhappy Ai-chan!.During a battle against Ira and Marmo, Ai suddenly starts crying, which causes Ira and Marmo to feel a surge of energy. As the girls struggle to cheer Ai up, Mana and Rikka hear from their respectives mother about how they were as babies. Having heard how much her mother appreciated having her, Rikka helps Mana look after a crying Ai during the night. The next day, as the girls take Ai to the park, Ira creates a Motorbike Jikochu, which grows stronger with Ai's frightened cries...