The first half of the episode was very hilarious. 10/10 there.
...But the second half was just a sandbag and his psychopathic sister. Uwegh...
When she soaked herself near the end of the episode, I think she topped everything else she has done so far. Very... ( ゚ Д゚)................
The only healing moment in this second part was Mr. Letter L.
The title for the preview... Grammer... and more importantly, it has been turned into an anime.