There are seven universes. Each universe has its own original characters holds the script, which is what you're reading. They were made to protect the universes from disaster and keep their worlds stable.(Now it says the crossover is Dakaretai and Fate Grand Order. This is an 7 story crossover. Kuroshitsuji, Durarara, Undertale, Sakamoto Desu Ga, Madoka Magica, Dakaichi, DL)

Los chicos de Sekaiichi Hatsukoi, Junjo Romántica y Dakaretai Otoko son llevados a una casa con una sala de cine para ver su serie, que secretos se descubrirán el no es amor se convertirá en si es amor habrán peleas, nuevas amistades y más.

Tokyo Yaoiverse #4 - Another of Usagi's books is getting the movie treatment, but this time it will be a live-action feature from one of his BL novels. The Dakaichi pair want to star. As I add more characters from other stories, keeping track of them all may be difficult. Please search for Tokyo Yaoiverse to find them all.