Looking for particular novel which about to describe what I remember.
Male lead reincarnated/ got transported into another world he either wok up fine or injured. But he is found by a strong female (tribe leaders daughter) taken as her perosnal slave. It is winter and the tribe retreat into a set of caverns to protect themselves from the cold. MC is forced into an abandoned shackbif he dies he is food if he lives he is slave.
MC heals and receives a meager rationing of food to last him winter uses modern knowledge to hunt small game (traps etc and fishing traps is major part early on) for food. Once he has surplus he trades it with people of the tribe for things he needs for example old worn out animal skins for warmth. Premission and Assistance in rebuilding his shack to protect from elements.
Their is one other slave who is jealous tries to kill MC and dies in process during snowstorm
MC drags his corpse into wilderness to be eaten by wolves to cover his tracks. Winter is over and MC is forced to travel with tribe to a larger place turns out tribe was some hunting party got stuck. MC builds a as he described military cafeteria for a tribe boss (simple for him, castle for the boss) MC escapes and gets captured again but by another tribe
That's all I remember