In the first episode of Ueno-San wa Bukiyou, Ueno was forcing Tanaka to drink her urine. (!!!) Why was she doing this?
Pretty much every episode is about Ueno's scheme to make Tanaka do some silly fetish-esque activity in the hope or either A) make Tanaka aware of her or B) have an opportunity to say some sort of comeback about how much of a pervert he is. It always fails because she either gets hyper-aware of the situation itself while he's always the straight man or she just can't spit it out.