An irritated Sun began unbuttoning her sweater for him, mocking his earlier warning, and the two fell into bed. The protectiveness continued in a softer manner when Sun became dehydrated and Jin managed to trade Sawyer a fish for two bottles of water. The Others dodged his questions about the Ajira flight, and after Kate incapacitated them, Jin left to search for Sun. The two then boarded Oceanic Flight 815. After seeing Ji Yeon's ultrasound Jin was awakened and remembered his and Sun's previous life, and the two laughed joyously. ("The Whole Truth") ("The Glass Ballerina"). Jin is one of the main providers of food on the Island.
In the flash-sideways, the pair were reunited and moved on with their friends from the Island. When she informed him of this, she also confronted him about how he'd treated Jin, blaming him for his death. This revelation appeared to bind them anew. Keamy then showed up, and Jin hid in the bathroom. ("The Shape of Things to Come") ("Something Nice Back Home"), Sun and Jin boarded the first ferry to the freighter, where Michael's presence surprised them. She denied and blamed the maid, fully aware this meant the maid would be fired. She began thinking she could be pregnant, and when she watched Aaron, Sun said mothers shouldn't leave their children, sounding odd when she then admitted to Claire she had none of her own. When Jack's appendicitis mandated surgery, Sun led an expedition to retrieve equipment from the Staff, where she discussed Daniel and Charlotte with Jin and showed him the ultrasound on which she'd seen their baby. Horace Goodspeed offered to return him to the mainland, but Jin joined the DHARMA Initiative. They then returned to the Barracks and rescued Jack and Sayid from a shootout. ("The Glass Ballerina"), Several days after their return, Jin quarreled with Sun over her attempts to teach him English.
She later supported Juliet when Sayid mistrusted her, but a tape of Juliet detailing Sun's condition to Ben stunned her into suspicion. Not knowing English, she couldn't help, and the officials confiscated the money. ("Man of Science, Man of Faith") ("Everybody Hates Hugo") ("...And Found"), Sun returned to her garden and was shocked when Michael stumbled upon her. Sun’s relationship with Michael suffered though when Jin violently attacked Michael for wearing Mr. Paik's Rolex. Namhae, South Korea
They found no plane, but they spotted an intruder, and Jin ran to apprehend him.
They went to the main camp, and, after several days trekking, Jin reunited with his wife.
Keamy spoke in English about his plan to kill Jin, but Keamy's other visitor, Sayid, wounded him and killed his henchmen. Koreans put their surname before their given name. Kate suggested Sun poison Jin's water to keep him off the raft, but Michael drank from the bottle instead, and he recovered soon anyway.
The work kept Jin away from home and often interrupted meals. He then revealed his weapon against "Locke" - Desmond. Sun awoke, recounted the story to the survivors, and recuperated.
They stayed a couple in the afterlife and moved on with their friends. Jin agreed to lead them there so he could find the beach camp. Mr. Kwon, a fisherman, proudly raised Jin as his son, though he himself isn't sure that he is Jin's real father. March 20, 1980 Reunited with their friends, Jin and Sun sat together in the church as a light washed over them, welcoming them to whatever the afterlife held in store for them. Place ("LA X, Parts 1 & 2") ("The Substitute") ("Sundown") ("Dr. Linus") ("Ab Aeterno"), The next day, the others' inactivity angered Sun. Later, still recovering from her emotional choice, Sun spilled coffee on to Jin's lap. The C4 exploded seconds later, taking half the ship with it.