Cast & crew
Happy Lesson (2001)
Crew
| Yasuhisa Kato | Character Designer |
| Mutsumi Sasaki | Character Designer |
| Mutsumi Sasaki | Original Series Design |
| Takafumi Hoshikawa | Series Director |
| Mutsumi Sasaki | Original Series Design |
| Mutsumi Sasaki | Character Designer |
| Takafumi Hoshikawa | Series Director |
| Yasuhisa Kato | Character Designer |