Ep. 15: Nagi gets lost in Shimoda while Hayate and Maria seek a growth-enhancing meteorite.
Aired on July 11, 2009

Nagi takes Hayate and Maria to Shimoda to view a meteorite believed to boost growth and grant special abilities. During the journey, Nagi disembarks to purchase a box lunch, only for the train to depart without her, leaving her stranded. After eating at a Russian ramen shop, she reunites with Ayumu, who offers her a ride on her bicycle to the next station. Concurrently, Hinagiku attempts to consult Maria regarding romantic matters but is interrupted by a call from Nagi. While on hold, Nagi and Ayumu encounter masked assassins targeting Nagi, who cannot distinguish her from Ayumu due to their similar pigtails. Ayumu flees rapidly on her bike along the highway, while Hayate searches for them on the same road.
Episodes
- Ep. 11 · Hinagiku questions her feelings while Hayate faces a cross-dressing curse before the festival
- Ep. 12 · Kotetsu kidnaps Nagi while Hayate searches in Hermione attire during Hinagiku's birthday
- Ep. 13 · Hayate and Hinagiku share cookies and memories after her emotional sword attack.
- Ep. 14 · Hayate battles yōkai and meets Isumi's great-grandmother Ginka Saginomiya
- Ep. 15 · Nagi gets lost in Shimoda while Hayate and Maria seek a growth-enhancing meteorite.
- Ep. 16 · Ayumu and Nagi escape killers while Hayate and Ginka pursue them to Atami
- Ep. 17 · Nagi and Maya search for a spaceship while Ayumu faces a medical emergency
- Ep. 18 · Hayate Practices Giving White Day Gifts to Ayumu but Accidentally Gives Them to Maria
- Ep. 19 · Nagi Ends Her Isolation and Hayate Fails to Amuse Sakuya