The urban legend of the 4:44 ritual consists of using a radio player to produce frequencies in front of the Akeyuki Sacred Tree at exactly 4:44, transporting people to a different dimension. When Asuka Tsuchimiya and her friends—Nana Nanase, Mia Silverstone, Yuu Tounaka, and Chloe Morisu—decide to perform this ritual as an activity of the Crystal Radio Research Club, they are shocked when the ritual works. The five travel to a parallel world, known as a fragment, where they meet an unsettlingly familiar girl—Asuka's parallel-world self. This Asuka is dubbed as Seriouska due to her serious attitude and capability to fight. Seriouska tells them about the great danger that faces all the parallel worlds, the Twilight. As it strips the parallel worlds of all of its possibilities, Seriouska seeks the death of the man behind the Twilight, the Twilight King, to stop his onslaught over the multiverse. Akanesasu Shoujo follows the five girls as they learn to accept their true selves, all the while searching for the Twilight King. However, the solution to the invasive Twilight might be closer than they think. [Written by MAL Rewrite]

The four goddesses alongside their sisters—Nepgear, Uni, Rom, and Ram—meet at a famous mountain resort in Lastation Kingdom seeking that nostalgic "summer vacation" feeling. But their plan to sit back and relax in a hot spring is interrupted when the younger sisters are swept into a portal leading to a parallel universe! The seemingly unfortunate situation takes a comical turn when they are greeted by a familiar face. [Written by MAL Rewrite]

The new OVA will feature the prequel short story "Snow Globe," which debuted as part of a light novel volume that bundled with a limited-edition version of the original PC game.

The Demon King Diablo is back as... God? A fateful encounter with the High Priest Lumachina Weselia finds Diablo and his party accompanying this mysterious stranger on a journey to cleanse the Church of its corruption. Believed to be God by Lumachina, Diablo eventually decides to protect her on her initial quest to find the head paladin, the virtuous Batutta. Diablo, Rem, Shera and Lumachina are joined by the grasswalker, Horn and the Magmatic Maid, Rose. Will Diablo fulfil Lumachina's wish? And can the Demon Lord from Another World truly play the role of God?