I thought if we stayed over, we would get along better? (お泊まりしたら仲良くなれると思った？, Otomari shitara Nakayoku nareru to Omotta?) is the ninth episode of the Netoge no Yome wa Onnanoko Janai to omotta? series that is written by Shibai Kineko and illustrated by Kazui Ishigami. It aired June 2, 2016.
To persuade Ako to get cracking on her summer vacation homework, the girls have a study session sleepover at Kyoh's gigantic house. However, without Hideki around to keep Ako under control, things soon get out of hand.