Wait a second.
OgCale was an "I can handle it" kid.
KRS was a "I have to handle it" kid
OgCale is the type that gets used a little too fast to solve everything on his own to the point where asking for help is not a thought he has had in a while, even when he really should. Thinks he's more resistant than he is and that if he can handle it, he should, even when it's not something he should deal with.
KRS is the type that has to learn to handle everything life throws at him, but will absolutely make it someone else's problem if he can. It's not if he should or can, he just has to. Whether or not he'd ask for help depends on what he has on the other person. More likely to trick (scam) someone into doing it. Would absolutely smack (not hard) OgCale's head for trying to do everything on his own.
I need an AU where they're like, elementary school classmates and just constantly worried for the other. Like 10yo or so children OgCale and Kim Rok Soo.
Kid!Rok Soo, following OgCale discreetly because his silly classmate just followed some shady people on his own. He really doesn't have space to worry about his silly classmate, but he won't be able to sleep if he lets him get hurt knowingly. Cue two literal children vs the gangsters little Cale overheard planning a kidnapping. Spoiler: the children win.
Kid!OgCale, dragging Rok Soo all the way to his ride and then to his own home because his dumb classmate is hurt and instead of getting help he was going to walk home on his own. Plus, he seemed scared about going home and in Cale's very correct opinion, if a kid is scared to go home then maybe they need a better home. Better home = his own home.
Bassen, who was also in the same ride: uhm. Hyung-nim, who...
OgCale: Bassen, this is Rok Soo. Rok Soo, this is Bassen, my little brother.
Bassen:
Rok Soo: hello.
Bassen: hello?
Deruth and Violan coming home, only to find an extra child there.
Deruth: Uh-um. Cale, son?
OgCale, from the spot where he, Bassen and Rok Soo were assembling a puzzle: yes?
Deruth: Don't you have something you want to tell us?
OgCale: ...Welcome back?
Violan, trying not to laugh: I believe your father means to ask who your friend is.
OgCale: Oh! That's Rok Soo. He's not my friend. He's our new brother.
Deruth: Excuse me?!
OgCale, slower: Our new b r o t h e r.
Deruth: I know what you said, son, but you can't just pick random people and decide they're family on your own.
OgCale: He's not a random person. He's Rok Soo. Also, he's hurt. *Gets hit softly with a cushion* You are. *Back to Violan and Deruth* I was waiting for you so you could take us to the hospital because apparently, you need an adult there, or they'll call yours. And I don't like his uncle.
Rok Soo: You haven't met him.
OgCale: *makes hand gesture* And yet.
Violan, who already caught on on what must be going on: Alright, we can call a doctor.
OgCale: And a lawyer.
Deruth, who understandably thought his son was just trying to make a friend in his own strange way: And a la— why do you want a lawyer?
OgCale, in the most "duh" tone he can muster: So he can be our brother. Weren't you paying attention? I can't just keep my classmate in my house without a paper saying he lives her, father. That's kidnapping.
Deruth: That's not—*Sighs*
OgCale's trash act never succeeds because, well, the whole dragging a classmate home to get adopted because he was hurt kinda immortalized him as a treasure. He could kill someone and people would think he had a reason for it. He gets the feral sweetheart reputation instead. Future art school student.
Rok Soo rats him out to Ron at least once per month for trying to do everything on his own and being reckless. OgCale rats him out to their parents for being reckless, getting hurt and trying to teach Lily (once she's born) to scam.
Bassen is the one who takes after his scamming ways instead.
OgCale/Rok Soo, about each other: he doesn't have survival instincts.
