Oppai Ero App is a visual novel with high production value and many menus to navigate. The story is pretty much an average guy in this all female academy interacting with girls and opening new scenes using a magic cellphone app. There is almost no interactivity, you just select in a well made menu screen which girl story you want to follow and that is it. It looks good, the art is very nice and an effort was put to make it overall very good to the eyes. The scenes are plenty with a bunch of different things happening but still your average jpeg with only a couple having some actual movement. There are ten adorable anime girls, each with its own story, some minor characters for short stories and some new scenes with multiple girls. It is fully voiced and has a rare good artstyle. If you are into visual novels this is a good game for you, but it's not much of an engaging game since you can press enter and pretty much unlock everything in a couple of minutes of play. Overall its fine, above average the many bad visuals novels around but nothing special on itself.