Live A Hero is a hero-based mobile gacha game developed by Lifewonders, who made Tokyo Afterschool Summoners. Taking place in the far future of an alternate universe Earth, space fairing humans and aliens have been living in peace and roam the cosmos, until from space a threat known as "Kaibutsu" (which roughly translates to "Monster" in English) appears. Humans and aliens from all walks of life take up arms as heroes to defeat this threat.