Ep. 1: Naota encounters Haruko after a neck kiss incident in ordinary Mabase
Aired on April 26, 2000

1
Naota Nandaba and Mamimi Samejima share a moment under a bridge before Haruko Haruhara strikes Naota with her bass guitar, creating a horn-like bump. Rumors spread about the Vespa woman leaving marks on those engaging in perverted acts. Haruko follows Naota to the hospital, where she is revealed as a nurse, before moving into his home as a maid. Tensions rise over sleeping arrangements, leading Naota to discuss Mamimi’s feelings for his brother in America. Mamimi suddenly claims she is overflowing, causing a Medical Mechanica robot and a detached body part to emerge from Naota’s head bump. The mechanical entities engage in combat until Haruko intervenes with her guitar, ending the fight abruptly.
Episodes
- Ep. 1 · Naota encounters Haruko after a neck kiss incident in ordinary Mabase
- Ep. 2 · Naota discovers his empty head while Mamimi worships a flying robot as a god
- Ep. 3 · Naota and Ninamori face personal scandals and supernatural cat ears during a school play rehearsal.
- Ep. 4 · Haruko's baseball prowess and a satellite threat endanger Naota in Mabase.
- Ep. 5 · Naota and Kanti duel for Haruko while a giant robot attacks the Medical Mechanica plant.