Suima Ho Gurai Shika Torie Ga Naikedo Gendai Chishiki Ga Areba Jubunda Yo Ne? (Kadokawa Books) [Light Novel]

[Machine Translation] One day, Frim, a five-year-old orphan living on the streets of a slum, remembers his former life as a Japanese. The world he now lives in is full of violence and unreasonableness, and he has no allies. He has only "magic that can produce water" and "modern knowledge. I wish I had at least a house with a roof over my head.... However, he has been able to improve the work environment with ideas that do not exist in this world, polish a nobleman's house to a shine with high-pressure water flow and ozone that disinfects and deodorizes, and even use explosion magic, which should be impossible, and he is gradually gaining attention.

スラムの路上で生きる5歳の孤児フリムはある日、日本人だった前世を思い出した。今いる世界は暴力と理不尽だらけで、味方もゼロ。あるのは「水が出せる魔法」と「現代知識」だけ。せめて屋根のあるお家ぐらいは欲しかったなぁ...。しかし、この世界にはないアイデアで職場環境を改善したり、高圧水流や除菌・消臭効果のあるオゾンを出して貴族のお屋敷をピカピカに磨いたり、さらには不可能なはずの爆発魔法まで使えて、フリムは次第に注目される存在に―!?