Lots of things happened and it got quite confusing. Zu An came back to the sea tribe with Liuyu, established Hongyu as the ruler of the sea tribe then left. He got the law beacon and became the ruler of both the cultivation world and netherworld, allowing him to fuse them together. He got the elixir to save Honglei and had her take it, but she still needs to sleep for a long time. He quelled the rebellion then put Liu Ning and Bi Linglong back in charge. He attended Chu Youzhao and Murong Qinghe's wedding, but Youzhao and her mother tricked him into having sex with Qinghe on the wedding night as Youzhao couldn't possibly do the deed. Qinghe still has no clue it wasn't Youzhao she slept with that night.
Zu An found out that Pei Mianman went to the demon tribes to find clues about her mother. (I think her mother is Yun Jianyue and Yun Yuqing's aunt? Sorry I forgot but anyway she's related to the Yun clan). An otherworld demon named Donal lusted after Pei Mianman but Zu An came in time to kill him and found out his plan was to sacrifice girls from the demon noble clans to activate a teleportation array, allowing the otherworld demons to come into the cultivation world. Apparently the otherworld demons are on the verge of extinction from a colossal hurricane. Zu An didn't like being passive so he went to the otherworld demons' world to plan a counterattack, along with Pei Mianman, Jiang Luofu, Ji Xiaoxi, Xie Daoyun, Yun Yuqing and Suo Lunshi (a demon noble girl who Zu An met before, though I don't remember when).
Miss Sarami - daughter of Lord of Slaughter who perished after Honglei performed her heavenly dance - asked Donal (Zu An's false identity) to open a passage to the cultivation world to save her father. Donal accepted the deal. Xie Daoyun confessed her love to Zu An during a private lesson and they became lovers. Zu An healed Jiang Luofu with direct souls interaction, not knowing it'd be even more intense than sex for Jiang Luofu, so now their relationship is a bit awkward. Steward Pi - an underling of the demon king - lusted after Jiang Luofu and Ji Xiaoxi and Donal almost killed him. The historian of time killed steward Pi and made everyone believe it was Donal who did it. The demon king arrested Donal but in the end believed it was another guy and let Donal go. Donal and the girls raided the demon king's treasury but Xie Daoyun found a piece of jade of good fortune and got sucked into who knows where just like Chu Chuyan. Donal and the girls messed with the protective barrier against the colossal hurricane and opened the passage at the same time, allowing them, Sarami and her men plus the true demon elders (from Donal's clan) to go to the cultivation world.
Donal led Sarami on a wild goose chase for a while before finally dropping his disguise and telling her that her father is dead. One of Sarami's men turned out to be the demon king and fought with Zu An for a while before Zu An got the upper hand. Another man under Sarami turned out to be the historian of time, tried to save the demon king to make him his mount, but the demon king still got killed by Zu An. The historian of time told Zu An that he was only an observer and he didn't frame Zu An on purpose as he didn't know Donal was Zu An in disguise at the time. The two entered a truce of sorts. Sarami told Zu An that Ji Xiaoxi has a special poison body and it may explode any time, killing herself and others near her. She gave Zu An an item to suppress Xiaoxi's body but it actually caused her to explode immaturely. Zu An suppressed Xiaoxi's poison body but knew it was a temporary measure. Sarami told Zu An she'd only tell him how to suppress it properly if he takes them to the cultivation world in the past, when her father was still alive.
Zu An took everyone to the past cultivation world then asked Sarami where to find the ingredients to suppress Ji Xiaoxi's body as well as Mogad (Sarami's uncle iirc) for details of the previous war between their worlds. They answered truthfully but Zu An went back on his word and recaptured them cuz he knew he couldn't allow Sarami to meet with her father. They assigned themselves roles, who to go for which ingredient or who to watch over the true demon elders and went their separate paths. The mermaid queen of the past asked the dragon king to join the demons' alliance instead of surrendering to the otherworld demons, but the dragon king said he would do so if the mermaid queen became his woman.
I tried to make it concise and I'm sure I forgot some details but damn this is still long as heck. Ranting a bit: Pretty sure the author has a 'virgin fetish'. Many women had long-lasting relationships with other men before they met Zu An like Mi Li, Yun Yuqing, Yu Yanluo, Shang Hongyu, but they're all virgins. WTF man is virginity that important?!
Lovers: Chu Chuyan, Qiao Xueying, Zheng Dan, Yun Yuqing, Pei Mianman, Qiu Honglei, Yu Yanluo, Bi Linglong, Liu Ning, Sang Qien, Yun Jianyue, Yan Xuehen, Tu Shanyu, Jing Teng sisters, Demon Empress, Shang Hongyu, Xie Daoyun
Potential Love Interests: Ji Xiaoxi, Chu Huanzhao, Chu Youzhao, Murong Qinghe, Jiang Luofu, Shang Liuyu (not sure where to put Liuyu tbh), Kong Nanwu, Tang Tian'er, Zhang Xiaodie (Maybe?), Nan Xun (Ambiguous Relationship)
Untouchables For Now: Mi Li, Daji, Mo Xi