An alternate take on the anime. After the battle between Class 2-F and Class 2-S, Yamato confessed to Momoyo for the second time, and rejected him again. But right after that, a horrid change of events and conspiracies had sent Yamato down the abyss of pain, sinking his heart to black depths, making him a changed man for the worse. How will he rise up from the abyss of his anguish?

A crisis has occurred and people from different worlds are thrown into the mix, with three Hikigaya Hachimans at the centre of it all. How will they overcome this crisis, without being at each other's throats?