I have finally figured it out.
The one line that distinguishes the good lemons from the bad!
Or rather, the lack of it.
"I'm going to cum!!!"
I'm not really a lemon fan, but I know a good story when I read one, and any
lemon writer who avoids the trap of using this phrase has my respect.
Can you say, 'Kun-chan'?

Thanks! ^_^

(But then, I can spell the word 'come' ... ^_~ )

Kun-chan...