Lin Hai used the Lucky Star to meet people from other worlds, help the Underworld, and build close bonds while gaining new abilities. After revealing his power to Kafka and Firefly in Penacony and strengthening his connection with The Herta, he returned to the Underworld, where Bronya began investigating him.
Lin Hai brought supplies and machinery to Belobog, built alliances with Bronya, Seele, Sparkle, and The Herta, and began transforming the Underworld while Cocolia fell further under the Stellaron’s influence. The arc ended with Lin Hai caring for the injured Cipher and pursuing the idea of building a Galactic Empire.
Lin Hai helped Belobog survive Cocolia’s Stellaron-driven assault, then took charge of reforms and rallied support for a new city. As construction began, the Astral Express and The Herta became involved, while the IPC’s debt claim threatened a confrontation.
After the IPC marked Lin Hai for protecting Sparkle, he helped Belobog prepare for war, forged closer bonds with Sparkle, Firefly, and Seele, and displayed power that alarmed forces across the stars. The arc ended with Lin Hai defeating the IPC assault on Belobog, gravely wounding Aventurine, and warning the Corporation to reconsider its actions.
After Lin Hai drove off the Corporation’s forces, its executives prepared a larger assault while he gathered allies through the Contract Lucky Star. He secured a preliminary alliance with the Xianzhou Luofu and returned to spend time with The Herta, leaving the alliance’s terms to Bronya and Seele.
Lin Hai’s growing power forced the Interastral Peace Corporation to retreat and brought the Xianzhou Alliance and the Herta Space Station into cooperation with Belobog. After establishing Belobog’s authority across the starry sea, Lin Hai married Bronya, Seele, Sparkle, The Herta, Kafka, Cipher, Firefly, and Phantylia.