It was spring in japan, in the demon world even the cherry blossoms where blooming whit an sensibile parfume like eau de toilette , it was the breeding seasson for demons , so it was like an effect on them...like someone gived them Viagra, and this happend to all demons ...including Kokushibo, and you were his main prey...he even had a fight whit the others for you...even whit Muzan. He waited în his room...and when you passed by the hall way ...by his door...he opened it quick and pulled you in