Bae Sejin/Story

### Dream K Contract Controversy

Just before TeSTAR debut, his former agency (Dream K) publishes an article about unfair contracts with his current agency, T1. He has a temporary mental breakdown, but with Park Moondae's advice, he shares a handwritten letter with the nuance that he had been coerced and pressured by his former agency, and conveys to his fans how he has became sincere being an idol despite his reluctance prior to Idol Inc. He manages to escape and completely freed from his former agency.

### Bae Sejin's Father Case

Before Ryu Gunwoo's regression, Bae Sejin was arrested for a drug distribution scandal that his biological father was presumed to be involved in, but in this life, he made up his mind before the incident occurred and succeeded in severing ties with his biological father and sending him to prison. Park Moondae was so angry at his biological father that he directly mentioned his ‘desire for cider’. Not only did he record Bae Sejin father's threats, he also reported to the police an illegal gambling house where fraudulent gambling was taking place, and because drugs were found there, his father was imprisoned without being able to gamble.

After his father's case was concluded, in order to prevent his biological father from selling his name in the future, he took Park Moondae's advice and changed his surname to Bae, his mother's last name.

### 'Reality' Universe

In the reality world, Lee Sejin is a famous movie star whose stock is currently at its peak. Due to his evil agency, he only took on roles that the company decided on, and in episode 381, he ‘awakened’ and remembered TeSTAR. After hearing the truth from Ryu Gunwoo (Park Moondae) that this universe is a kind of dream and there is a reality to return to (so he doesn't have to worry about the long-term future), he completely overthrows the unfair treatment by exposing the agency's corruption with evidences that he has been collecting.

After hearing that Park Moondae is trying to return to his original world by winning the grand prize after his debut, he initially considered participating in the Wise, but after Park Moondae dissuades him from saying that it is inappropriate in many ways, he decides to help appropriately from outside instead. When he visits the live broadcast of the final round, he disguises himself with a mask and did not make a voice, but it is so obvious that anyone could see that he the famous actor Lee Sejin and that the people he is rooting for are Ryu Gunwoo and Cha Eugene, so it became a hot topic among general public. After Wishze's debut, he promotes Ryu Gunwoo through InHeart, which gives him the image of a Ryu Gunwoo fan, and he uses his position as a movie actor in his prime to ask for movie OST work. Lee Sejin is the one who suggest that he, Ryu Gunwoo, and Seon Ahyeon should recreate their unit stage (from TeSTAR first concert) in an award ceremony, so that Seon Ahyeon can regain his memory.

### Company System Update : STier Memory

Unlike other STier members who momentarily 'possess' their TeSTAR-self, STier Lee Sejin only make his appearance in consciousness world of the System where he meets Park Moondae. In episode 511, he tells the other STier members that he fought the drug case until the end and won, saying, “So STier is not a drug group.”. He says that, even if he wins the case, it doesn't mean that the already disbanded STier will return, but he stil want them to know that STier didn't fail because they deserved to fail, but because they was falsely accused, and he wanted to prove to the other members that it wasn't their fault.

Even until the end, TeSTAR Bae Sejin doesn't fully regain his memory. He only regains parts of his memory that STier Lee Sejin let him knows about, but it's enough to make him realize that his current situation is not 'I was lucky enough to meet good people and made it this far', but 'I was actually a person who could achieve this much', and he ends up gaining a great mental growth.

## References

1. ↑  It is true that it was an unfair contract, but the bigger purpose was to keep Bae Sejin (was still Lee Sejin at that time), who became famous through an audition program, from leaving their company. In the past, if a celebrity wanted to leave the company, they would spread false rumors to bring them down, making it a typical evil agency.
2. ↑ Koreans usually use cider to express refreshing and satisfied feelings.
3. ↑ He doesn't change his surname in this universe. His biological father, who had been holding his back during the timeline of STier and TeSTAR, was missing after a divorce.
4. ↑ Although the situation is different and his appearance has changed, Bae Sejin immediately believe that Ryu Gunwoo is Park Moondae because his words, actions and personality are the same as the Park Moondae he knows.
5. ↑ The reason why STier Lee Sejin did not give up even though he was falsely accused and criticized by the public was not because he wanted to prove that he was not a drug addict, but because he wanted to protect the reputation of Steer.
6. ↑ They have an intense debate in the conscious world, between 'I won't give it back because it's a memory that won't be good to know anyway' (STier Lee Sejin) VS 'It's my memory, I'll get it back' (TeSTAR Bae Sejin)