Male protagonist every man decides he's going to sample his classmate's drool because he thinks she's cute and then they become a thing over it. I don't even know if this qualifies as ecchi. It's so tame and as someone that hates fanservice it makes some of the most tame stuff I've watched look raunchy.
I really dig the old art style because it lends itself to the mysterious nature of the series, I kept wanting to know more about the protagonist's love interest but sadly you're never really given any relevant information, which is kind of disappointing.
The biggest problem with Nazo no Kanojo X is the same one I have with Mirai Nikki, the main love interest carries the show on her back.The MC can be dumb as hell at times and often deserves everything that comes to him, making you roll your eyes over his hormonal/emotional assaults on the love interest.
There's a side character that's interesting but she's typically used as a plot device and her role could have been improved.
Biggest gripe would have to be that each episode ends with some dumb narration by the protagonist and it makes it feel super cheap and cheesy.
If you like weird concepts or have some kind of saliva fetish you'd enjoy Nazo no Kanojo X.
