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 | Time | |
|---|---|---|
| 1 | You Know? | 2019-04-02 |
| 2 | Parallel World Constitutive Theorem | 2019-04-09 |
| 3 | Tears That Can't Be Stopped | 2019-04-16 |
| 4 | Dirtied White Skin | 2019-04-23 |
| 5 | Spiral of Tragedy | 2019-04-30 |
| 6 | Beyond a Pale Light | 2019-05-07 |
| 7 | The Cause of the Curse | 2019-05-14 |
| 8 | The Sparrows and Swallows Know Not | 2019-05-21 |
| 9 | The Distance Between Him and Her | 2019-05-28 |
| 10 | Feelings Overlapping | 2019-06-04 |
| 11 | That Kiss, Once More | 2019-06-11 |
| 12 | The Secret Under the White Coat | 2019-06-18 |
| 13 | An Ordained Fate | 2019-06-25 |
| 14 | The Transfer Student's Friend | 2019-07-02 |
| 15 | A Summer That Won't Come Back | 2019-07-09 |
| 16 | Within Unmoving Time | 2019-07-16 |
| 17 | A Pale, Ephemeral Vow | 2019-07-23 |
| 18 | Twilight in Dela Granto | 2019-08-06 |
| 19 | The Bond Between Parent and Child | 2019-08-13 |
| 20 | Into the Rafaelo Desert | 2019-08-20 |
| 21 | The Quarry Where Demons Rule | 2019-08-27 |
| 22 | Escape from the Quarry | 2019-09-03 |
| 23 | The Imperial City, Where the Wind Blows | 2019-09-10 |
| 24 | The Truth of Dela Granto | 2019-09-17 |
| 25 | The Promised Ritual | 2019-09-24 |
| 26 | A Girl Who Chants Love at the Bound of This World | 2019-10-01 |
