So, I wasn't sure how to write this but, I honestly truly love this VN, I dont normally go for the romance type games or ones that allow the control of female characters but this game really did click for me, so much in fact that I started playing earlier in the morning and just now finished.
Also, I really wanted to go the straight romance route with Ian/Lena, and I wasn't sure if avoiding the advances of the other women in the game, was a detriment or not, I kind of want to start a second game save and experiment, maybe you guys can give me some ideas on that.
Currently, only sleeping with Allison or Cherry causes negative repercussions to the relationship between Lena and Ian, Lena will find out about it in chapter 6 and it will cost some relationship points. But on the flip side, Ian can take that opportunity to come clean with Lena about him sleeping with other people while he and Lena haven't fully figured out what they want from each other, she doesn't respond too poorly to his confession and could maybe be the best oportunity to open up an "open relationship" route.
Honestly almost everyone Ian can sleep with has some chances of blowing up on his face eventually, going after Emma or Cindy can mess up his circle of friends big time and since Lena is starting to be a part of the gang she would find out about it.
Cherry and Allison have minor consequences for the time being, but considering Allison is a bit obssessed with Ian and the theories surrounding Cherry (she potentially being the girl Axel cheated on Lena with) seem to indicate it could get worse and worse.
Sleeping with Minerva and being the big office chad might affect things with Holly, she's not dumb and I doubt Ian and Minerva would be able to keep their secret from her forever, and since Lena cares for Holly she'd probably find out and get pissed off about it.
No idea where EvaKiss wants to go with the Holly route, she's absolutely setting up Ian-Lena-Holly being the cutest threeway couple as the dream scenario, but getting there could be tricky, Holly going from being shy to having a boyfriend and a girlfriend at the same time would certainly be unexpected, and who knows how she will react to Ian and Lena being a couple.