(Hi, I'm copy pasting this from another comment)
Sorry I'm just getting to this, but I attached a temporary fix for it on patreon(the one on the free version, it's not paywalled). Just add that small .rpy file to your game folder, and it should add +5 affection for Sera when loading a save so it's easier to get the scene. I explained why it’s currently hard to get in a reply on that post if you’re curious, but I’ll be lowering the requirement in the next update anyway. This is just a temporary bandaid fix in the meantime.