How First Love Monster works

First off, both are not legally an adult anyway.
There's no sex so far.
Their ages are close anyway. 15 is a high school freshman.
In the US, the fifth grader is an upperclassmen. They could've made it even more.
Older woman, young male.
It's a shojo. Not too much perversion is involved.

Mob Psycho 100, Episode 1: I was not impressed

There's some comedy there and everything looks ugly. That's the purpose, but the animation looks weak and lazy. The story is sorta slice of life and it doesn't that well that way.

Pokemon Generations Episode 2 preview on the Pokemon channel

This was good.
You got to see police officers use Pokemon in a good mix of camp and darkness vs Giovanni. They infiltrate Giovanni easily.
He was presented as a real threat to the peace.
Gambling. Hideout.

Berserk 2016 episode 1 was enjoyably bad

So they start off with this weird naked fairy who has no genitals.
Everything's like Disney CG except they chop people in half bloody and skull like.
There's some ugly dudes.
One dude with a viking bra.