Translation:
It's impossible to lose then
No XD
You... you just missed the point. Monster Girl Encyclopedia has a female assertive leaning. The game is designed for that. That's all.
You lose when you reach 100% love and the monster girl
does not.
You win when you reach 100% and the monster girl also reaches 100% love.
After they become your wives though, encounters with the girls are impossible to lose.
Reach 100% love or don't, you'll get to keep playing.
Mind you I didn't say it's a femdom series.
Lots of maledom and lots of submissive girls. Just saying the way the game is designed means that no matter what right now, the protagonist will get sexually overwhelmed by his monster girl wives.
By the way, it's so hard to lose you probably haven't even seen the loss scenes.
If you reach 100% love and the monster girl does not, your
adventure ends. You get a black screen text-crawl of how your life will be going forward, and what kind of relationship you have with your wife. Since you didn't get her to 100% love but you reached 100% it basically means that she leads the relationship and chooses what you do and don't. Normally winning means they accompany you. If you lose, "you accompany them."
Either way you're together and married.