This manga had an amazing premise and a lot of potential. The main character decides one day to lick the spit of a newly transferred classmate, and it causes an unnatural reaction from the main character. It is soon revealed that there is more to meets the eye when it comes to the girl's spit. In fact, her spit can cause the main character to share feelings, memories, and sensations when they eat each other's spit. I started this with very positive feelings toward the premise. It sounds weird, but I felt like a lot could be done with this premise, and towards the beginning, the story was definitely doing that. The characters were getting into unique situations and were sharing experiences only they could share, and I was enjoying the story. Around the halfway mark, the story started overstaying its welcome, and the progress that the main couple so desperately needed started diminishing. I started realizing by chapter 60 that there would be no significant change to the main character's relationship. Any hope I had at change was going to be in the final chapter, and for around 30 chapters, it felt like the story was now sticking to a formula that it was too scared to move away from, and it was a little bit frustrating. Finally, we make it to the last chapter, and the main character and main love interest are at the perfect point to develop or do anything. The easiest form of this is to make them kiss, and the story does exactly that. The main characters are about to kiss, and then they stop. The main character is sad that their routine will change, and they both feel the same way. Remember how I said it felt like this manga was sticking to a formula that it was too scared to move away from, well there you go. The ending is literally the main couple being too scared to move away from their same routine. In this story, the best way for the author to have ended it was to do literally anything to change up the interactions between the main couple, and instead they chose to make an ending that isn't good, but can't be bad. It's probably one of the most boring endings I could have ever read for a story with such an amazing premise. The beginning half of the manga felt like it really knew how to make these characters go through unique interactions, but the author didn't know how to really evolve it after a while, and that dragged the whole story down in turn. I really wanted this manga to be amazing, especially when in the first chapter, the main girl says that a "voice" told her that the main character would be the one to take her virginity. I was expecting a clear story structure with the author knowing exactly what they wanted to do. The first few chapters genuinely felt like that, but then it just went down the drain. Then there are the unexplained mysteries, like "where did the voice come from" or "why does her spit make her connect with the main character?" But the author chooses to answer none of that, and it's so damn frustrating, especially when the manga could have been so amazing. I want to give this a higher score, I really do. There is just 0 excuse for me to do so and it's a shame. Overall it's still a good story, but it's not anything special even though it really could have been.