Anime Crossover: An Investigator of the Myriad Worlds, Classmates with Touka Kirishima

After transmigrating to the world of Tokyo Ghoul, Lin Yuejian becomes a First-Class Investigator with the CCG. By day, he trades barbs and jokes with Touka Kirishima. By night, he hunts ghouls with a quinque in hand. After binding to the System, he receives his main quest: become a Special-Class Investigator and unlock travel between worlds.

Just as he's fretting over how slowly he's leveling up, he gets cornered in an alley by Rize Kamishiro on a stormy night.

The woman is lusting after his body, so he retaliates with a whip kick that sends her flying dozens of meters, then grabs an umbrella and makes a swift escape.

He watches from the shadows as Ken Kaneki gets his stomach torn open by Rize, then turns around and runs into Tatara and the SSS-rated One-Eyed Owl, Eto.

He turns and runs at once. Eto stares silently in the direction he disappeared for a moment.