A mobile gacha game. You collect "Idol Units" and send them into procedurally generated malls. The twist is that the zombies are also collectible. You can capture zombie variants and train them to perform on stage. The monetization is aggressive, but the core loop of "Fight, Loot, Fashion Show" is addictive.
Unlike your typical rom-com, the fanservice here is baked into a brutal, fast-paced thriller. Fresh Take on the Apocalypse: -manga girls zombie party-