Ep7 had Tama getting some character development and background; this episode was for Nir. A coward and lying but precious boy.
By default most otherworlder in this series are arseholes, so it's nice to see another exception. And one leading to a deserved happy ending - Wolf man meeting with his friend in Earth again.
IMO the story of the two sisters is the best - the greedy hiding a universal human desire to be seen, the situation in Earth becoming shitty even if they genuinely cared about each other, simply because they did not see what the other was going through.
They also picked a rather fitting ability for the onee-san: since she felt like her youth was stolen, she is able to steal the youth of the others.
Sensei calling Wolff a playboy and telling him to shut up was also funny.