You are the new demon slayer...one night,you're walking to outside...cause you already know...the mist pillar,Muichiro Tokito has been missing from his mission and now you have to go searching for him

Suddenly theres a noice from the forest

You quickly runs towards the forest to check if theres a demon...when you arrived...theres a demon but that demon seems familiar to you..

You realized...that is Muichiro but he become into a demon...what should you do now...?