Arima Takuya is a young student whose father, a historian who has conducted various researches, disappeared recently. During a summer vacation Takuya receives a peculiar package from his missing father, along with a letter containing information about the existence of various parallel worlds. At first Takuya doesn't take it seriously, but soon he realizes that he possesses a device that allows him to travel to alternate dimensions. Is his father alive, after all? If so, where is he?
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | You Know? | 2019-04-02 | 25 min |
| Season 1 | Episode 2 | Parallel World Constitutive Theorem | 2019-04-09 | 25 min |
| Season 1 | Episode 3 | Tears That Can't Be Stopped | 2019-04-16 | 25 min |
| Season 1 | Episode 4 | Dirtied White Skin | 2019-04-23 | 25 min |
| Season 1 | Episode 5 | Spiral of Tragedy | 2019-04-30 | 25 min |
| Season 1 | Episode 6 | Beyond a Pale Light | 2019-05-07 | 25 min |
| Season 1 | Episode 7 | The Cause of the Curse | 2019-05-14 | 25 min |
| Season 1 | Episode 8 | The Sparrows and Swallows Know Not | 2019-05-21 | 25 min |
| Season 1 | Episode 9 | The Distance Between Him and Her | 2019-05-28 | 25 min |
| Season 1 | Episode 10 | Feelings Overlapping | 2019-06-04 | 25 min |
| Season 1 | Episode 11 | That Kiss, Once More | 2019-06-11 | 25 min |
| Season 1 | Episode 12 | The Secret Under the White Coat | 2019-06-18 | 25 min |
| Season 1 | Episode 13 | An Ordained Fate | 2019-06-25 | 25 min |
| Season 1 | Episode 14 | The Transfer Student's Friend | 2019-07-02 | 25 min |
| Season 1 | Episode 15 | A Summer That Won't Come Back | 2019-07-09 | 25 min |
| Season 1 | Episode 16 | Within Unmoving Time | 2019-07-16 | 25 min |
| Season 1 | Episode 17 | A Pale, Ephemeral Vow | 2019-07-23 | 25 min |
| Season 1 | Episode 18 | Twilight in Dela Granto | 2019-08-06 | 25 min |
| Season 1 | Episode 19 | The Bond Between Parent and Child | 2019-08-13 | 25 min |
| Season 1 | Episode 20 | Into the Rafaelo Desert | 2019-08-20 | 25 min |
| Season 1 | Episode 21 | The Quarry Where Demons Rule | 2019-08-27 | 25 min |
| Season 1 | Episode 22 | Escape from the Quarry | 2019-09-03 | 25 min |
| Season 1 | Episode 23 | The Imperial City, Where the Wind Blows | 2019-09-10 | 25 min |
| Season 1 | Episode 24 | The Truth of Dela Granto | 2019-09-17 | 25 min |
| Season 1 | Episode 25 | The Promised Ritual | 2019-09-24 | 25 min |
| Season 1 | Episode 26 | A Girl Who Chants Love at the Bound of This World | 2019-10-01 | 25 min |
| Sound | Asaka | Theme Song Performance |
| Sound | Kazuya Tanaka | Sound Director |
| Sound | Keishi Yonao | Music |
| Sound | Ryuu Takami | Music |
| Visual Effects | Mai Otsuka | Character Designer |
| Sound | Konomi Suzuki | Theme Song Performance |
| Directing | Tetsuo Hirakawa | Series Director |
| Sound | Evan Call | Original Music Composer |
