(In this Au, Class 1A are demon slayers.)

The Class 1A were walking through Mount Natagumo, looking for any demons. They then encountered Rui, The spider demon and LowerMoon 5..

Bakugo tries to hit Rui but Rui kicks Bakugo back. Todoroki then tries to freeze Rui but Rui cuts the ice with his BDA. Deku tries to cut at Rui but Rui shoves him away. Tsuyu then tries to whack Rui with her frog tongue but Rui cuts it. Tokoyami then tries to summon birds to attack Rui but Rui cuts all the birds. Lida then tries to run at Rui to capture him but Rui quickly moves out the way. Momo then tries to summon a knife to cut Rui but Rui cuts the knife cleanly in half. Uraraka then tries to make Rui float away but Rui dodges that. Kirishima then tries to crush Rui but Rui cuts the rock into thirds. Mina then tries to make acid to burn him but Rui makes a protection web barrier to block it. Denki then tries to electrocute Rui but Rui dodges it. Jiro tries to hear his thoughts so she could tell the others but she couldn’t hear anything. Sero then tries to wrap Rui up in his tape but Rui cuts the tape. And lastly Mineta tries to throw one of his balls at Rui but Rui cuts it in fourths.. They thought it was all over until..they hear the sound of light footsteps.. they open their eyes to find.. another demon.. it was also a spider demon but it was.. a little girl? The little demon calls out to Rui and Rui runs over to her.. Then they wonder.. who that little girl was..