This spin-off focuses on the various side-characters from the main manga.

An anthology comic of Re:Zero kara Hajimeru Isekai Seikatsu by various mangaka.

Aikawa Ayumu is a normal high school boy. One day he is killed by a serial killer and revived as a zombie by a necromancer named Eucliwood Hellscythe. He starts to serve Eu as her guard but he happens to deprive the mahou shoujo Haruna of her magic power. Haruna orders Ayumu to fight against the anti-mahou shoujo system "Megalo" in her place.

The anime main line story revolves around a second year high school student, Riku Aoba, who has just recently transferred to the holy cross high school, where he notices, upon joining, several unique and funny occurrences, often being the target of a series of events and races administered by the student council and its fun-seeking president. While at the academy, Riku meets the original Tokimeki Memorial Online characters and the story begins. (Source: Wikipedia)