Awakening System, Confession to Junior Sister at the Beginning

Lu Changqing traveled to the world of immortality with his past life memories and became a genius disciple of Qingyun Sect. After waiting for eighteen years, I finally got the legendary Golden Finger - a "mission system" with a unique style of painting. The novice gift package includes the "Ultimate Invincible Big Slippers", and the novice's task is: "Confess your love to the junior sister Su Ling'er". Lu Changqing looked at the reward of "Ten Years of Cultivation" and gritted his teeth: If you confess, just confess! Anyway, it's just a formality. Based on our pure relationship as brothers and sisters, she will definitely refuse! However, after he stuttered and said "I love you" - The seemingly well-behaved and weak little junior sister threw herself into his arms with tears in her eyes and said "I do" tremblingly. The plot... Doesn't seem right? Before Lu Changqing had time to sort out this sudden "Tao couple relationship", something even more shocking happened: the little junior sister in his eyes at the Jindan stage easily suppressed him (the early Yuan Ying stage) until he couldn't move, picked him up and took him back to the boudoir... Lu Changqing finally realized that his junior sister was not as simple as she seemed.