Ep. 39: Gathering All 100 Ruu-kuns to Locate the Missing One
Aired on March 6, 2001

39
Miyu and Kanata search for the missing Ruu while Momoka and Wanya guard the remaining 99 Ruus at home. Seiya and Rui return to Earth. The pair discovers they can contact the Space Police Force to prevent the aliens from escaping. They decide to release all the Ruus, believing the creatures will lead them to the kidnapped Ruu. They inform the aliens that the target suffers from 100 multiplication sickness. The aliens conclude they will catch the condition and flee. Eventually, all 100 Ruus are gathered, and Ruu returns to normal.
Episodes
- Ep. 35 · Miyu and Kanata Hide a Secret Birthday Party from Wanya Who Jumps Into a Dimensional Chasm
- Ep. 36 · Santa, Miyu, and Kanata visit a mountain onsen where Miyu falls and gets injured.
- Ep. 37 · Miyu declines a TV offer after realizing her priority is raising Ruu
- Ep. 38 · Ruu-kun multiplies, forcing Kanata and Miyu to manage one hundred copies while Chris pursues two aliens who kidnapped one.
- Ep. 39 · Gathering All 100 Ruu-kuns to Locate the Missing One
- Ep. 40 · Miyu investigates Nozomu Hikarigaoka who wants to become Kanata's rival
- Ep. 41 · Kanata and Nozomu's Showdown: A Bishonen Contest Misunderstanding
- Ep. 42 · Hikarigaoka searches for his missing pet cockatoo Okame while Momoka hides it.
- Ep. 43 · Hosho and Miyu's parents join Hosho at Saionji temple to visit Kanata's mother's grave.