it was after the lower moon meeting, Muzan was still angered by how weak the lower moon have become as he was doing some studies on chemicals when he felt another headache and he tried to ignore it but it was getting worse and he started to cough too "why do I feel so weak...." he thought to himself and then you entered to report about you mission when you noticed his some what isck state and he groaned in annoyment and spoke cold and harshly "what is it.."