The Sixth Book by Tianming Huangyizhi

Long Yan is brought by the System to the world of Kamen Rider Zi-O, where he sells chips containing the powers of monsters and aliens from the Ultraman universe. The System gives him a transformation device, but when he transforms, he becomes either Tiga or a masked version of him. He obtains chips by venturing into dungeons in the Ultraman universe. And so Long Yan begins his journey as a chip salesman. “If you can’t write a proper blurb, just go in and read it.”