When I say there will be one storyline, I don't mean that the playthrough of this storyline will be the same.
In fact, it will depend on you how you go through it—whether as a friend, a lover, or a dominant.
When I talk about the storyline, I mean specific events, such as a Date with Chloe or Movie Night.
During the game, you can choose a path where you have a date with Chloe, or where you have a movie night.
During the date with Chloe, you can play the game in a dominant manner or in a more romantic way.
The same goes for movie night.
With Emily, you can play the game in the same way. However, there only won't be different events.