Ep. 4: A new student joins the group and partners with Kousaka to study men.
Aired on November 2, 2017

4
A new student arrives at the school and decides to partner with Kousaka to learn about men. This sheltered girl attempts to evaluate Shinozaki as a potential partner but finds that he fails to satisfy her expectations. Consequently, the new girl, Rina, begins to explore other options for her studies. The situation highlights the group's ongoing efforts to understand male behavior through direct interaction and observation, leading to unexpected results as Rina seeks alternative approaches to her goal.
Episodes
- Ep. 1 · Shinozaki confesses to Kousaka, who promises to learn every aspect of being a good girlfriend.
- Ep. 2 · Kousaka and Kanata compete for Shinozaki's attention while Kousaka seeks cooking lessons from Ariyama.
- Ep. 3 · Shinozaki meets Kousaka's eccentric mother during a house visit
- Ep. 4 · A new student joins the group and partners with Kousaka to study men.
- Ep. 5 · The girls tease Shinozaki until a misunderstanding leads to hilarious responses
- Ep. 6 · Kousaka's new friend Seiya causes Shinozaki to struggle with intense jealousy
- Ep. 7 · Shinozaki and Akiho discover a stray dog while a school camping trip announcement brings comedic chaos.
- Ep. 8 · Igarashi discovers Shinozaki in a compromising situation while Akiho faces her own difficulties