Using SMAPI and content patcher, I've started on making some events for Krobus. Currently there is just the 2-heart event, but it's kind of basic. I'd love for any ideas or suggestions! Dialogue is not my strongest, but no one else has made this yet so I had to! I tried making this once before, but my computer gave up on itself which meant I had to restart. I plan on remaking the sprite edits I did before to change his married hug to a kiss as well. In the future, I also want to use the 10 heart event as a sort-of faux wedding with just the two of you. It should start when you enter the sewer on a rainy day (besides Friday) with Krobus at two hearts.
Im waiting to hear back but if they agree, I may implement some of these (I have a few of my own ideas so some would have to be booted) https://forums.stardewvalley.net/threads/krobus-heart-events.7561/#post-45262