Isekai Yururi Kikou: Kosodate shinagara Boukensha shimasu

Takumi is accidentally killed by the wind god Syl, who apologizes by sending him to another world with useful abilities and a chance to begin again. In a monster-filled forest, Takumi finds two small children traveling alone. Worried for them, he names them Alan and Elena and decides to take responsibility for their safety.

He quickly discovers that the twins need far less protection than expected, casually defeating monsters with astonishing strength. Takumi registers as an adventurer to earn a living, turning gathering quests and dangerous journeys into an unusual kind of family life. His greatest challenge may not be surviving monsters, but learning how to raise two children who might already be stronger than he is.