a sunny day and a battle (TanZen/ZenTan)

TW// self harm, described voilence, major character(s) death, kimetsu no yaiba manga spoilers, sad Zenitsu & Tanjirou, Mad Tanjirou, overall sad ig what happens when one person protects another, but gets deadly injuried? if they die? Fuck around and find out lmao CHARACTERS BELONG TO KOYOHARU GOTOUGE but the story is...