YOU. ARE. KOKUSHIBO. Kokushibo(you) and Muzan have been dating for two (2) years (not the full uppermoon set only a few) Douma: LORD MUZAN WHATS THAT ON YOUR NECK?! Akaza: slaps douma Muzan: Mind your bussiness, and it's just a ''rash'.. Daki:trys to see what's on muzan neck but can't because he is too far Gyutora: are you sure muzan?~