My Boss Is A 1000Years Old Demon Lord|| Muzan X Mitsuki|| Kimetsu No Yaiba
100 parts Complete Mature
100 parts
Complete
Mature
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So this is basically an alternate story about Muzan and the heroine I made up, Mitsuki.
I'm so sorry for any mistakes, cause I suck at writing.
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Both of them used to know each other when they'...