水魔法ぐらいしか取り柄がないけど現代知識があれば充分だよね?

A five-year-old orphan, Frim, struggling to survive on the streets of the slums, suddenly regains memories of their past life as a Japanese person. Surrounded by violence and injustice, with no allies to rely on, Frim possesses only one magic ability—to produce water—and modern knowledge from their previous life. Even having a roof over their head seems like an unattainable luxury… However, by introducing ideas unheard of in this world, improving working conditions, and discovering new uses for water magic beyond drinking, Frim gradually begins to make a name for themselves—and change their fate!