[ Tsumugi has this very worried look on his face, and he even looks like he hasn't slept for days due to extensive research. But in spite of that, he lets out a soft sigh of relief. ]

Oh, so that explains everything! I thought I had to scour the entire library just for the cure.

My friend is greatly affected by it, and is a lot more frail as a result because of a medical condition he's had his entire life. I hope this gets resolved soon because I don't know if he can make it.