Those Things About Me and My Senior Sister

He has a unique physique and was taken up the mountain by his master, where he met his pretty senior sister by chance. She, the legitimate daughter of the Duke, finally has a younger junior brother. During those years on the mountain, with the fights and sect elections, he discovered his true feelings, but it seemed that his senior sister really regarded him as a younger brother. After the changes in Kyoto, she finally saw her true feelings clearly. "Senior sister, I have been in Kyoto for a while. I want to go to the hot springs alone outside the city. I may not come back tonight." In the high-pressure world of immortality, they are each other's salvation. This love is unparalleled in the world.