So basically its like the MC has a system and its a QT i think? The first arc was of him being this ancient noble son or something being married off to the ML. And the ML shackled him with this cold chain and wrist bracelet that basically has this like cold curse? Then eventually the MC dies cause there wasnt a key to unlock the bracelet. The second arc was interesting cause the MC went to the 2nd world and realised that apparently it was the same world but in a more modern timeline and that his previous body was still existing due to the ice from the curse.