Overview
But if you don't take us mice seriously, you'll die (copyright sense) (ネズミを甘くみると死ぬよ(著作権的な意味で)) is a dangerous mix in many ways. This is what Nazrin, the first boss of Undefined Fantastic Object (which also serves as the mid-boss of the first and fifth level), says in response to the protagonists' mockery of her mouse status (in fact, mice carry deadly infectious diseases and have killed a tremendous number of people, albeit indirectly).
Add to this the word copyright and you get "ha ha!" (in a high-pitched voice).
Related Illustrations
On rare occasions, there are illustrations with Pikachu as part of the joke.
Related Articles
Touhou Touhou Project Undefined Fantastic Object Yuuka Kazami Mickey Mouse
