Here are some recommended low-key lifestyle novels:
1. "退休魔王的佛系生活日常" (Retired Demon King's Low-key Life) - This fantasy novel follows the protagonist, Luo Yi, a retired demon king, as he leads a peaceful and laid-back life. (Document [1])
2. "反派少爺只想過佛系生活" (The Villainous Young Master Just Wants a Low-key Life) - This novel tells the story of a villainous young master who desires a low-key lifestyle. (Document [2])
3. "佛系反派洗白日常" (Low-key Villain's Whitewashing Daily Life) - This novel portrays the story of a villainous character who protects the abused and vulnerable in various worlds. (Document [3])
4. "佛系青年不玩戀愛套路" (Low-key Youth Doesn't Play Love Tricks) - This light novel follows the protagonist, Xia Chun, who, after experiencing the ups and downs of life, decides to pursue a simple and peaceful existence. (Document [6])
Please note that these recommendations are based on the provided search results and may not encompass all available low-key lifestyle novels.