I think this design is unreasonable. If the player chooses revenge as their goal instead of being seduced by Mio, they'll find that satisfying revenge scenarios are severely lacking—there isn't even an ending where the protagonist personally kills Mio and successfully escapes without being discovered.Also, the way Mio humiliates the protagonist’s sister in front of him is extremely unpleasant.
Viewing post in I Hate My Waifu Streamer comments
Thank you for understanding. If you play the game carefully, you'll notice that both the sister and Mio show signs of psychological issues. They each have traits that are both pitiful and detestable. But family definitely deserves better treatment from the protagonist than someone he fell for online after just a few days. That’s why I prefer the revenge route—let Mio go to the underworld and have a proper conversation with the sister.