Ronja falls ill and can't help but worry about Birk.
| Title | To Be Done in Secret |
|---|---|
| Genres | Comedy Animation Family Action & Adventure |
| Release Date | 2014-12-13 |
| Episode Runtime | 00 Hours 25 Minutes |
| Season Number | 1 |
| Episode Number | 11 |
| Production Companies | NHK, NHK Enterprises, Dwango, Polygon Pictures |
