Gridman The Hyper Agent: Series
Gridman The Hyper Agent: S1 E3 - Imminent Telephone Panic
S1 E3:
Daichi and Ippei's little sister Kana gets trapped in a container carrier. Volcadon destroys the telephone station's computer, making Kana's cellphone to go kaput. Ippei is convinced that Gridman will take down Volcadon, and searches for Kana.