At this point I belive that Sera will try to kill Shioon becouse he didn't tell her for who he is working for and becouse her grandfather was kiled from his master, but Jinie would interfere and blurt out; "Shioon and I are from Sunwoo clan !!!".
Sera would look surprised and together with her group walk away, telling Jinie that she doesn't want to come into "large" conflict with Sunwoo clan and rather never be able to join her (beloved) grandfathers "X clan"*. Because that would make "Sunwoo clan" and "X clan"* an enemy in wich "X clan"* would probably lose. This would mean that she(Sera) would lose the only remaining thing her grandfather left behind.
* - A clan wich exact name nobody from the readers know untill this point.
Then Jinie would call for ambulance from Sunwoo clan and all will be over.
The doctors would say that internal injuries from Shioon (broken rib, brain concussion,...) are so bad that he would need at least half a year to recover.
The next morning elder Kwon would interrogate Jinie what the hell was she thinking becouse the client(Shioon) is in worse shape than his bodyguard(Jinie)!?!
After Jinie will explain to elder Kwon everything that happened, elder Kwon would be even more furious: "How that Shioon punched that Yoo-Ji-gun guy but you(Jinie) leaked such an important information(that Shioon and Jinie are from Sunwoo clan) to an enemy (Sera).
But at that time Shioon would come, and say: "Excuse me for interrupting but can I take a shower my body is all itchy, becouse my scabs are falling off?"
Both Jinie and Elder Kwon would be: "He is already up and more importantly, how the hell was he able to completely heal himself from that kind of injuries???"
At the end Shioon would go to school 1 day after the fight completely healed and at his walk to the school(remember that he does not want to stand out of ordinary) he would meet Yoo-Ji-gun guy.
Shioon would remember how he was punched from that guy when his guard was down so he would immediately take the posture of his stance.
But Yoo-Ji-gun would say that he fought him becouse he wanted his sister(Sera) to respect him more and follow him, so he would tell Shioon to be friends from now on and than he would walk away.
Right after that Yoo-Ji-gun would tell to Sera that Shioon is perfectly OK, but Sera wouldn't belive him. So she would go look for Shioon.
When she meets him after Shioon walks home from school, he immediately takes the posture of his stance but she just want to ask him how can he be alright after such a beating!?!
Shioon would tell her he can heal any normal injury within half a day!!!
Sera would start thinking and said:
Sera: "Hmmm so let me ask you this, if I fuck you untill near death you will come back nice and healthy next day. Am I right?"
Shioon: "You are asking to much for an enemy!!!"
Sera: "That's interesting..."
Jinie: "What the hell are you thinking it's my job to protect him from such a maniacs like you!!!"
Sera: "I see so you want to join and I must include you too(Jinie would blush). Let me some time to think this clearly.(Than she walks away)"
Shioon: "Huh !?!"