Cross of Venus belongs to the 'Dengeki Gakuen RPG' series, which reimagines the protagonists of several light novels published under the Dengeki Bunko imprint -from publishers like ASCII Media Works- as classmates at the same fictional school, combining their universes into a shared plot and RPG system.
It's a product designed exclusively for Japanese readers familiar with those source light novels, a crossover fan-service exercise that never sought -nor had- a release outside Japan.
If you liked this one
