hmm so this will be a story about how Miyoshi (aka YOU) is Muichiro & Yuichiro's younger sister and yea it follows the manga so if you haven't finished it dO Not rEad tHiS or muzan will hEE hEE yOU. decided to write this because our precious bb mui deserves more love 😔👊 all characters belong to Koyoharu Gotōge except for the oc!

A bored Rimuru Tempest accompanies Diablo when he goes to meet with an old friend in the Netherworld. What will happen when he meets an out-of-place human boy who piques his interest? (Tensei Shitara Slime Datta Ken and Mairimashita Iruma-kun crossover)