Braindrop himself has explicitly said that season 1 is being reworked. It's one of the things that gets mentioned here constantly. None of the original early chapters should be considered canon (e.g., originally Rachel met the MC for the first time when Azel quit her job, but the retcon is that Rachel has been a lifelong family friend (this version is already in the game in season 2)), and he is actively removing the implications of incest. I'm pretty sure someone pasted his words from Patreon or Discord here within the past 2 months regarding the removal of teasers. There was the possibility of the MC's extended family (blood and Azel) having relations with other female characters, but not the MC.