The sword was drawn, and the lights immediately turned on. Walking around at night, looking for keys in front of the front door, and then a sudden power outage. The ``moment I want to illuminate'' always happens suddenly. Well, in this day and age, you can usually get by with the light on your smartphone, but you have to rummage through your phone, unlock it, and find the button on the light... yeah? Isn't there a lot of processes...