“Music video for "Ichi Ni no San" by Penthouse, the opening theme for Mairimashita! Iruma-kun Season 4.”
One Two Three
一二三
Would You Love or Hate This?
AI-powered analysis tailored to your taste
Based on your preference for character-driven stories with layered emotional arcs, this title's exploration of identity and belonging would deeply resonate. The pacing mirrors series you've rated highly, and its thematic depth aligns with your appreciation for nuanced storytelling...
However, the slow initial episodes might test your patience given your history of dropping shows that don't hook you early. The art style shift in the middle arc could also be a concern...
Synopsis
Music video for "Ichi Ni no San" by Penthouse, the opening theme for Mairimashita! Iruma-kun Season 4.
Music video for the song Ichi Ni no San by Penthouse. The song was used as the opening theme of the anime Mairimashita! Iruma-kun 4th Season.
What people say
Watch Order & Related
Explore the One Two Three universe
Cast
See all →Trailers & videos
See all →Gallery
See all →If you stay for this, you'll stay for these
See all →The community pairs this with
See all →Made by
See all credits →Production slate
A Music Production
- Format 1 × 3′ eps × min
- Total runtime 0h 03m all episodes
- Aired Apr 2026 – ongoing
- Source Music media type
- Rated PG 13 - Teens 13 or older
- Ref. BS-29571 catalog