[DeepL Translation - needs review] Introduction to Volume 1: Genno and Kato, who were supposed to be hit and killed on a subway platform, are instantly transported to a mysterious apartment. Genno and the others are ordered to assassinate the Negi aliens by an unidentifiable black ball placed there, and they are transported to the Negi aliens without understanding the situation. The green onion alien is killed by his friends in the apartment, but a new green onion alien appears...
(Translator: DeepL)
