Specials (2019)
Release date: 2019-04-21
Episodes (23):
1. 「Behind the Door」 Room403
Release date: 2019-04-21
2. 「Behind the Door」 Room502
Release date: 2019-04-28
3. 「Behind the Door」 Room304
Release date: 2019-05-05
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4. 「Behind the Door」 Room102
Release date: 2019-05-12
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5. 「Behind the Door」 Room201
Release date: 2019-05-19
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6. 「Behind the Door」 Room101
Release date: 2019-05-26
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7. 「Behind the Door」 Room104
Release date: 2019-06-02
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8. 「Behind the Door」 Room301
Release date: 2019-06-09
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9. 「Behind the Door」 Room402
Release date: 2019-06-16
10. Special
A touching special episode portraying the love story between Nana and Shota from the day they meet to their proposal.
Release date: 2019-06-23
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11. 「Behind the Door」 Room203
Release date: 2019-06-30
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12. 「Behind the Door」 Room401
Release date: 2019-07-07
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13. 「Behind the Door」 Room202
Release date: 2019-07-14
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14. 「Behind the Door」 Room404
Release date: 2019-07-28
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15. 「Behind the Door」 Room304
Release date: 2019-08-04
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16. 「Behind the Door」 Room204
Release date: 2019-08-11
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17. 「Behind the Door」 Room502
Release date: 2019-08-18
18. 「Behind the Door」 Room501
Release date: 2019-08-25
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19. 「Behind the Door」 Room103
Release date: 2019-09-01
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20. 「Behind the Door」Spin-off 「Past Door」Part.A
Release date: 2019-09-08
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21. 「Behind the Door」Spin-off 「Past Door」Part.B
Release date: 2019-09-15
22. Episode 22
Release date: 2021-12-10
23. Episode 23
Release date: 2019-12-10