1. Rebirth is not entirely true, The Ring Item only turn back the world time 2. The System Is just when the awakening is carried out ( get the sword god class and sublime ability[later get upgrades], also the MC is selling the item he sublimate up to diamond grade (beyond that he can't sell it because the Zhang Family will only buy MC item and become more difficult to get revenge) so he stopped selling item of epic and above quality (mostly the affix is op). 3. MC is on the run of pursuit by the zhang family and have limited time in the real world (MC always enter dungeon/copy world after getting back to real world for up to 1 week or less) 4. The Only Time MC stay long in the real world is when he is participating in competition 5. Read to the end and all your doubts and dissatisfaction will be answered (this is a good novel) the downside is that translate is a bit confusing between he and her got mixed so just read as is.

The commitment of the author that use mc to say "women will only affect the speed bla bla ***" Then only 10 chapter later the mc has to party with a women senior to make the guys in college jealous". The concept is good but, the women keep Increasing and the mc keep getting pitted (lowered IQ) until harem is established