After transmigrating to a crossover world inhabited by heroes, weirdos, monsters, and all kinds of creatures, what do you do when Vaccine Man appears from the start and destroys a city?
"I... can't do anything..."
[Password correct. System activated!]
In the Demon Slayer world, he saves Nezuko's family, but through a twist of fate, he also brings Muzan, disguised as a snow rabbit, into the Demon Slayer Corps. This allows Muzan to overcome his weaknesses to sunlight and wisteria flowers. The demons are all strengthened and launch an all-out attack. Fortunately, he uses a System reward, a Senzu Bean, to turn the tables, then captures Muzan with a Pokeball. To survive, Muzan has no choice but to turn into a girl and act cute for his life...
Back in reality, he meets Honkai characters who have become heroes. They enjoy school life while fighting off the arrival of monsters, but along the way, everyone is somehow bewitched by the will of Honkai and turns into Herrschers. And what are they fighting over? To return everyone to normal, he takes action...
In the Genshin Impact world, he meets Aether and Paimon and joins the Knights of Favonius. Using books in the library, he develops his Anemo abilities. One day, he happens to meet Diona, who's out looking for strange cocktail ingredients. After helping her out, he is invited to her home and they become friends. The Church of Favonius asks him to help Rosaria with her etiquette, and with Barbara's help, he finally manages to sort things out. He sets out for Liyue, but a huge storm blows him off course and he ends up in Inazuma...
