I thought if I declared my love, I was sure to succeed? (告白したら成功確定だと思った？, Kokuhaku Shitara Seikō Kakutei Da to Omotta?) is the sixth 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 May 12, 2016.
Hideki is nervous about revealing his true feelings for Ako before summer vacation. When the first term's final exams draw near, everyone rallies behind Ako, who is in danger of flunking the term, in order to make sure that she passes.