I feel as though this dialogue will finally explain why she vomits all the time.

Virtud said:

I feel as though this dialogue will finally explain why she vomits all the time.

She vomits because of how sickeningly sweet romantic feelings are.

Diabeetus from thoughts alone.

Essentially, Kutaka and Komachi had the same idea to visit the same establishment and chatted for a bit. Kutaka noticed the ring and asked about it. Komachi pretty much said that she's engaged and Shiki is going to be the judge that will ratify her subordinate's marriage. Satori, in the bathroom, heard everything.