After Being Defeated by My Junior Sister at the Beginning, Something Was Wrong with My Younger Sister.

[Fantasy Cultivation of Immortality + Daily Life + Multiple Female Protagonists + Shura Field + Slightly Sick Girl] Yi Xingchen accidentally traveled to Xuantian Continent and embarked on the path of cultivating immortality. Unexpectedly, he was drugged and taken down by his junior sister at the beginning. In order to take responsibility, Yi Xingchen doted on his junior sister without hesitation. Unexpectedly, the master and senior sister gradually became strange, and their eyes looked at him full of something wrong. Until one day, the sister who had been clinging to him appeared. In order to compete with his junior sister for his brother, the cute and innocent sister gradually became yandere. However, Xuantian Continent is not safe, and powerful enemies from outside the territory may attack at any time. In order to protect his beloved, Yi Xingchen has a sword that can kill everything.