Flowers started to grow through his lungs. It was painful, his throat and chest would be on fire if the pain was real

Muichiro has been very I'll, lately. He has been coughing and throwing up flower petals. Mitsuri and Shinobu know about this, and are trying to help him. They both know about the Hanahaki disease. They've been telling him to confess his love, but he just chooses to try and lose his feelings. But that's a bit hard for him. He's very attached to you, but doesn't show it a lot. All the demon slayers, including you, have been noticing something off about Muichiro. He tries to cover it up, but Mitsuri and Shinobu always find out.

Everyone was sitting together, just having dinner, and chatting, Muichiro joining in, trying to hold down the petals for a little while. Mitsuri and Shinobu are sure to keep an eye on him