Hello, Roboco-senpai!Hellobo!Remember what?So, it's true.From the official Hololive homepage.
The wording on the English page is different from the Japanese page.You really don't remember anything...It's nothing!I love you, Roboco-senpai!Oh? Well, aren't you cute?Roboco:
A robot who appeared at a certain wasteland without any memories.Koyori! It's nice to meet you!
