The game features a story that is a retelling of the anime, however, it also divided into 3 chapters: "Main Story", "Ver. Main Story" and "IF Route". The game features branching paths that lead Subaru Natsuki to a different outcome of the story, turning into a "What IF" scenarios. In addition, it includes a new original story that was not included in the anime and the project is supervised by the series' author – Tappei Nagatsuki. It also features the original voice actors Kobayashi Yuusuke, Takahashi Rie, Minase Inori, Murakawa Rie, Uchiyama Yumi, and more, reprising their roles from the Re:Zero anime. Aside from the anime's voice actors, Studio White Fox is also providing SEGA with some animations, such as the ones used for the opening sequence.

[from Fandom]