One of the reason why Jin was able to reach level 50 at age 5 is because of the daily quest but even if he did all of the daily quest he would not be able to reach level 50. He would need to be age 10 in order to do that.
So the other reason is because of his secrets sometimes Jin would use the excuse of training to go hunting for monster
*Father I will go hun- ahem! I mean training now*
*Ok Jin be safe*
*"That was close I almost told my father I would be hunting. Well than let's get hunting"*
Jin than went Hunting but all the monster were too weak for him
*Man this monsters are weak*
*Krrk* said the monster while being scared
*What you want to die*
*...*
Jin than killed the remaining monster and was ready to head back but he encountered an obstacles
*"That should be it lets go back now"*
*Ahh leave me alone you peasants*
*"Huh. That sound seems to be coming from that direction"*
Jin than went to look at the direction
*This pesky peasants always annoying me*
Jin saw a girl that was being attacked by goblin
*"Well looks like she doesn't need my help"*
*Who that come out*
*"Oho not bad she can sense me even though I hid my presence"*
Jin than got attacked
*"Wow she is not a patience one"*
*Who are you I told you to come out*
*What I was just walking by. Why did you suddenly attacked me*
*Oh great it just another peasant*
*Who are you calling a peasant?*
*You of course*
*Well I will just walk by*
*Hey who told you that you can go*
Jin didn't stop and still kept on going
*This guy is pising me off*
Jin than got attacked by a fire ball magic
*That what you get for not listening me*
What she didn't think was an counter attack
Jin threw a rock at her almost hitting her head but he made it so not to hit her
*Oi you talk to much so shut up and go do your own business*
*"What the I didn't even notice that rock if he didn't intensionally miss it. My head would have been blow off"*
*I don't have a good personality. Ok so go when I am being nice*
*Guards arrest that man. For attacking a noble* said the girl angrily
*Yes mam!*
*Wow I was giving you a free chance to leave but you ain't buying it huh*
*Who are you to attack the young miss*
*Attack him*
The guards where charging at Jin but he disarmed them and cut their Armor
*I told you to leave*
*G-guards come back. We will get revenge later*
*Wow wow who said I would let you go*
*B-but you told us we can leave*
*Well that was a one time thing*
The girl than started blushing because Jin was too close to him
*Ca-can we go now*
*Go*
*Ok*
They than left and Jin went back to his house before his father noticed him being gone but someone was watching Jin
*Hmm not bad Young Master Jin I guess it not bad being his sword*said Hina
A while later
*"Hoo my arm are sore is it from the training?"*
*Go call Jin* said James
*Young Master Jin partriach is calling you*
*Ok I will right there*
Jin than went to his father room but there were a surprise guess waiting for him
*Father did you called for me*
*Yes Jin come sit here*
*"Ohh it's the youngest son of the Okkutsu family...wait why is he here"* said the girl
*Y-y-y-you why are you....*
Jin than noticed the girl and he put his index finger on his lips telling her to be quiet
*Shh* Jin said
*...*
*Do you two know each other?* Said James wondering
*Nope Partriach never met her*
*Ok she is going to be our new trade partner so make sure to greet her well*
*Ok father* said Jin while smiling
*Jin go give her a tour of the house*
*Ok father*
*...* The girl remained silent
*Wh-why didn't you tell me your the young Master of the Okkutsu family*
*...*
*Are you just gonna remain silent?*
*...*
*Umm...*
*I remained silent because I don't want to use the fame of my family unlike somebody* said Jin while looking at the girl
*...* The girl remained silent because she was embarrassed
*You gonna introduce yourself now or what?*
*I-i am Chloe Sinclair. We just started trading so we are not that famous*
*And why were you calling me peasant*
*I was just scared that you would take advantage of me*
*Do I look like someone that would do that?*
*K-kinda. Don't hurt me*
*Hah I am not here to discipline you I am just here to tour you*
Than Jin toured Chloe around the house
*This is the courtyard*
*Oh wow you have a fountain* said Chloe amazed
*This is the living room*
*It's big*
Jin than toured her to the remaining places
*Are you curious about anything?*
*Yes*
*What is it?*
*Why were you there*
*Wdym?*
*I mean why are you out there. I heard that the Okkutsu family doesn't allow there children who is less than 10 years old aren't allow outside*
*I just snuck out*
*"Hahaha I can used that as a way to take advantage of him"*
*And don't even think about using that as a advantage against me*
*"He can read mind"*
*Nope I can't. Your face is too easy to read*
*...*
*You look like you are thirsty.*
*Ye-yes*
Jin than pulled a drink with his telekinesis power
*Here*
*You can pull thing without touching it?*
*Yeah?*
*You must be a genius*
*Can't anyone do that?*
*N-no you need to be atleast a master at magic to do that*
*Oh really "I need to stop using my power freely. If my father saw that he would question me for ages"*
*Keep that a secret or your dead* Jin said while looking at Chloe
*O-ok*
While Jin was talking with Chloe. Sara came rushing at Jin
*Jinnn!!!!*