I did not know why the score was this low. Personally, I think this is a great game. Short and get straight to the point. The writing and the animation are pretty erotic.
Is it worth five stars? Of course not, but I enjoyed it while it lasted. It is worth at least 4 stars. I gave it 5 stars just so that I could pull up the average a little bit. I probably wouldn't consider this game as good if it required grinding repetitively and did not get straight to the point.
The sad part is that the Story is very linear, and after you're done with Eliza, you can't interact with her anymore. It's like spending so much time and effort collecting precious memorabilia. but you can't access it once it's locked in the box. I wish to know what Eliza had become after she belonged to the player and if she was truly in love and romancing with the protagonist.
TLDR, short but good. Sadly, you can not further romance Eliza or other girls after you complete the game. But it was enjoyable while it lasted. So I want to give it a 4. But I want to pull up the score a little bit so more people will know this game is worth playing, so I leave it a 5-star review.
Update: The ending cut scene is surprisingly good, has a lot of variations, and it seems that the developer poured in a lot of care into at least making the ending battle scenes and sequence with that S-rank girl. If you play the game without seeing the ending, you might think it is worth 3/5. But if you see the ending sequence, I should say, it is at least worse 4/5, if not at 5/5