guess I will just go on with my path as the game is quite bit to replay 5 times.Nope. DPK insists that Being a DIK isn't a harem game so hard choices have to be made. If you commit to any of the main LIs then you are locked into having sex with that LI and that LI only. You can flirt with other girls and even make out with one girl at the Halloween party (episode 9) but that's as far as you can go with the current content. There are cheating points that you can earn in episodes 9 & 10 but aside from the make out scene I would hardly consider the MC's actions to be cheating. We'll have to wait to see what the cheating points will do in future episodes.
If you want to see all paths you have to do at least 5 separate playthroughs (Bella, Jill, Jade, Jose/Maya, Others).
Things could change in the future but with the current content the answer is no.
But I remember someone once posted all his saves when he was transferring to s3 and it showed jill and bella together in that ending. Maybe was an edit.