The day after receiving the gifts.
Bulma handed Ubuyashiki Kagaya her modified "Demon Slayer World 2.0 Laser Sword" and solemnly went over the precautions.
"...That kind of beam harms humans about as badly as it harms demons. Excessive exposure, especially to the eyes, throat, heart, or other areas, could leave permanent disabilities or even cause death, so be extremely careful when using it.
"If you really find yourself in a life-threatening situation, press the red indentation at the very bottom of the hilt, then throw the Laser Sword away. It will self-destruct after a five-second delay, preventing it from falling into the hands of evil people."
"As for its energy supply, as long as you do not use it too frequently, it should last three to five months without any problems. If you conserve it, it can last even longer."
"Thank you."
Ubuyashiki Kagaya bowed once more and carefully put away the Laser Sword.
Now that the Laser Sword had been delivered, figuring out how to use it was up to the Demon Slayer Corps.
The Nine Hashira were generally quite skilled with swords. Aside from people like Himejima Gyoumei and Kanroji Mitsuri, whose weapons had unusual shapes and could not be casually replaced, the others should be able to quickly master the Laser Sword. Selecting two suitable "sword bearers" from among them should not be difficult.
And next...
Came the final and most important purpose of Uchiha Hikari's trip.
Late at night.
Snow Mountain.
Halfway up the mountain.
Uchiha Hikari, Bulma, Tanjiro, and Rengoku Kyoujurou, who had followed them all the way there, came to a stop.
Before them stood an old-fashioned wooden house that looked weathered with age. A few lonely graves lay nearby. Although spring had already arrived, the high altitude meant that much of the