Well I really liked this harem story, and the fact that any sharing is totally decided by the player (I'm not a fan of it, but I noticed there is no content bleed...so its nicely hidden with the writing).  But it would also be great if some of the main girls when alone with MC (or leaving the scene, or when Val comes home from work), they would give MC a kiss to show their affection for him.  It would give off more of a romantic relationship feeling to the story, considering they are already having sex with the him.
Also at the starting of the story when MC decided to soul bond with the succubus, it would have been cute if she got excited and kissed MC on the cheek after it was completed (he sort of saved her life choosing to bond).  And then MC would touch his cheek and drift off for a bit, this would show how cute she can be to him.  And it could be the starting point to their romance...as they go forward to further build their feelings for each other.
I also liked the scene in the tavern, when MC went to pick up Val and they decide to have sex on the table.  It was a well done scene, and didn't feel transactional like I find with Val in front of the bed with the list of intimacy choices.  It's nice to see more of those random sex scene with his girls, but also seeing them kiss him to show their affection towards MC.    Especially when they greet him when they meet, as a kiss says they are with him...and appreciate and desire him (gives off the harem feeling).      
Regards