...to be the moral compass.
You see a little kid with someone older and already make it in something perverted. What is wrong with you?
Let's be honest here, who, as a kid, didn't have a crush on someone older or let's say infatuation? Maybe a friend's older brother/sister? Other friends? Neighbors? Etc.
Just because someone who is older is nice to you, doesn't automatically mean they want you. Eg. my sister is 8 years older than me - so her friends were also 8 years older than me and they were all kind to me and sweet - and none and I mean NONE were inappropriate. And from personal experience, unfortunately, I know what it means to be preyed on.
And these high an mighty ppl who see predators everywhere - not everything is disgusting and inappropriate.
As for this story. Tsubaki is the one pursuing Yuu and Yuu is oblivious, because he DOESN'T have the same feelings. If, and only if, they get together when they get older - so what? Are you saying that relationships with age gaps are perverted?
If this story takes a turn that Yuu actually takes action to have a relationship (and a mean a romantic one) with an underage Tsubaki - then yes, I will stop reading, but as long as it is like it is now - I don't see an issue...at least not with these two.