Isekai Yururi Kikou: Kosodate Shinagara Boukensha Shimasu

A man named Takumi is killed by a god and reborn in a forest filled with monsters. There, he discovers two young children with immense strength and an endearing personality. Impressed, he adopts them, calling them Alan and Elena, and takes on the role of their caretaker. To support them, he enlists in an adventurers’ guild. His new life involves adventuring while overseeing the development of his two new charges.