On the whole matter of Sosul, Shioon & Jinie...
I agree that Sosul has to start all over, in order to wash away the "kid/little sister"-stamp she has on her in Shioon's eyes. Ah well, at the very least, she has Shioon's promise to take her to an amusement park
As for Jinie and Shioon... They are indeed growing a bit closer, but as Shadow5YA says, it's more a matter of Jinie being affected by Shioon so far. Then again, this is more or less the standard case for Shioon - most people that encounter Shioon are affected by him rather than him by them and this has been the case for some of the "coldest" or "thorny" personalities we've encountered so far, such as Sosul, HyukSoChun, Jinie - and Goomoonryong himself.