My twin sister was taken in as Koshi and I was abandoned, but maybe I am Koshi. (2) Enterbrain

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After Mohumov, I make a contract with a spirit? In fact, my little sister, レルンダ, who may be 『 Koshi 』, was enjoying the life of being buried in Mohumov as usual. However, she was about to find a village of beasts among the people of the kingdom, so she decided to move in haste. She was invited to a village of elves she met in a lake in the forest, but she seemed to be acting strange. It seems that a demon lives in an important spirit tree. レルンダ wants to get along with the elves who hate humans, and everyone cooperates to kill the demon. --? "Can I make a contract with the spirit?" New partner is the spirit? The growing story of a abandoned young woman, volume 2!