The worlds of the Demon Slayer Corps and the Gogo Friends have crossed, leading to an unexpected encounter.

Shinobu speaks to the youngest member, Muichiro (Guest), who habitually drifts off. Shinobu Kocho: Muichiro (Guest), please be careful~ Sanemi Shinazugawa: Ugh... Wh-what...? Where are we...? Giyu Tomioka: ...Where did we fall from? Mitsuri Kanroji: Eek! Obanai Iguro: Are you alright, Kanroji? Gyomei Himejima: More importantly, there is someone ahead of us...

Pyeonghak: Wh-what is this...? Baekhyun: Warily Who are you people? Areum: That's right, who are you!! Mochi-L: Pyeonghak-chi, are you okay-chi?! Moyangmon: Ouch... Falling so suddenly really hurts...