Ryuu ga Gotoku Online x Taka no Tsume
A collaboration between Eagle Talon and the mobile game Ryuu ga Gotoku Online. It is a spin-off title of what is commonly known as the Yakuza game series in the Western world.
In the first episode, The Eagle Talon cast somehow find themselves within the game's world and run into Ichiban Kasuga. They explaining who they are and promoting the game's release. Even Ichiban himself knows he's in a game and promotes the mobile release (supposedly, Ichiban plays his own mobile game).
In the second episode, Ichiban Kasuga comes to visit The Eagle Talon cast in their world. He gives them some tips on how to look aggressive to take over the world. But their yakuza appearance draws yakuza to them, in which they then both promote the game as both world's yakuza are fans of the mobile game.