Multiple female leads, crossover anime, no eunuch ending, protagonists lacking any true goodness or beauty.

While traveling through various anime worlds, Tetsuya Amano unexpectedly discovers that all the female protagonists have a treasure chest with a progress of 0% above their heads, which triggers his obsessive-compulsive disorder!

The key to open the box was actually on the male protagonist.

To control them and their lives.

Tearing apart Aki Tomoya's dignity and publicly humiliating Hikigaya Hachiman.

When Aki Tomoya knelt at his feet, when he treated the Service Club like a playground...