Semerarete ~Onna Kyoushi~

A female teacher next door who brings in a man or masturbates every night, has her moans leaking out.

The protagonist feels lucky about that, and is always peeking at her through a hole in his room while masturbating satisfactorily.

But one day, Eri stormed furiously into his room. Could it be that she discovered the hole?

[Translated from Getchu]