Okay so this game confuses me, so the game doesn't have a cheating tag, and cheating isn't in the planned tags, and yet the MC has a girlfriend. I realize that there two separate timelines, but the tag isn't even in the planned tags. So do you get the option to break up with her before you do anything with others girls in the present time, or is she just okay with you fucking others, and then later on you get to decide to break up with her and go with another girl instead.
Regardless of the answer, if Julia is a relatively good looking LI (not sure which is her on the banner, but they all look pretty good), and isn't a terrible person or really annoying. Then I'm only ever going to play her path, and won't cheat either, so the only way I will ever see any sexual content with any other character in the present time, is if she's okay with it. I don't enjoy breaking the heart of an LI who doesn't deserve it, which is the only real downside for me when it comes to games where you already have a girlfriend/wife.
Oh also I saw the lesbian tag in the planned tags, so I'm guessing threesomes will be a thing, but will there be any poly relationships possible, or will all the endings be monogamous only. (If you don't wanna answer this one I understand)