Slow Transmigration: Mengmeng's Cultivation

【BL + seme protagonist + multiple male leads】 Shen Mengxing transmigrates into a cultivation world and is taken in by an elder of the Qingxiao Sect, who raises him as his son. He has a dream-cultivation System, so sleeping all day counts as cultivation. Whenever he sees a handsome man, he wants to go meet him. He never achieved immortality, and when his life finally ran its course, he opened his eyes in another world the very next second, with all his cultivation intact.