A Couple of Cuckoos x Overlord: Mistaken Collaboration

A Couple of Cuckoos x Overlord: Mistaken Collaboration (「カッコウの許嫁」×「オーバーロード」取り違えコラボキャンペーン) is a product campaign collaboration between A Couple of Cuckoos and Overlord

Overview
A special campaign sponsored by KADOKAWA for the lucky fifty people in a lottery to acquire special collaboration visuals. Starting from September 15, 2021 to September 30, 2021.

Trivia

 * This was the second crossover for A Couple of Cuckoos in its special "Costume Error Collaboration."
 * Campaign was to promote the upcoming anime for A Couple of Cuckoos set to air in 2022.
 * In order to apply a Twitter account is needed.