Tensei Shoujo wa Mazu Ippo kara Hajimetai: Mamono ga Iru Toka Kiitenai!

After discovering that she had a constitution that required magical power, she was reincarnated into another world, Trilgaia, by the goddess. Rejuvenated to a 10-year-old body and overcame a weak constitution! However, she is sent to a mountain full of monsters, and she can't even walk outside! "Self-reliant slow life in another world!"