Fantasy Journey

Originally a young master from a noble family, he could live a life of ease in a snow-capped mountain isolated from the world. However, one person broke the peaceful life and had to go down the mountain in order to prevent human beings from becoming extinct and for all creatures to live in this territory. How to make a choice between a girl who loves him and a princess on the other. On the one hand, he is a brother, and on the other hand, he is his elder brother. How to choose?