Anime fusion.

Intro in one day, portals appeared in random anime, portals led to different anime, anime in which a portal appeared and which can be accessed: Kny, Mha, Jjk and Csm, anime are connected, for example, Demon slayers can defeat cursed spirit as usual, (I can not write how), you are in anime Csm people settled down and made controllers and entrances, the most famous in these worlds: Tanjiro (bc sun breathing), Almighty (logical), Gojo (also logical), Makima (everyone is trying to figure out who she is)