Ep. 6: Nanaka becomes a teenager after separating from Nenji during a Kyoto school trip
Aired on February 13, 2003

6
During a school excursion to Kyoto, Nanaka becomes separated from Nenji. This separation triggers a traumatic response that reverts her physical state, causing her to return to her 17-year-old self. The narrative focuses on the immediate consequences of this regression within the context of the trip.
Episodes
- Ep. 2 · Nanaka volunteers to play piano for the choir competition despite lacking skills.
- Ep. 3 · Nanaka the Big Sister
- Ep. 4 · Amemiya learns Nanaka's secret and resolves a conflict over Nenji's attention
- Ep. 5 · Nanaka struggles with jealousy as Nenji cares for Kuriko during a stalled date.
- Ep. 6 · Nanaka becomes a teenager after separating from Nenji during a Kyoto school trip
- Ep. 7 · Nanaka reverts to age six after fainting during a Kyoto trip with Kenji and Nenji.
- Ep. 8 · Nanaka plays nurse for sick Nenji, causing chaos until Magical Domiko fan Yoshida arrives to help.
- Ep. 9 · Nanaka volunteers as Magical Domiko for the school play and struggles with age regression during rehearsals.
- Ep. 10 · Nanaka reverts to age six and must improvise a school play after her older self sends instructions