Fantasy: There Is Something Wrong with My Senior Brother's Brain

This book is also called: My senior brother is obviously super strong but he wants to be a salty fish. And: How many treasures does the senior brother have and how many little fangirls does he have? There is also the final version. The version that will not be revised even if it is to die: The journey of becoming an immortal by the upright elder brother who is too rude. While shouting that there will be trouble, one sword will be used to make a supreme genius. The above information comes from a young junior sister who is incomparably beautiful, noble, generous and smart. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.