I haven’t been able to find any IruKaka doujinshis. If anyone can link me I’d really appreciate it.
I personally don’t know, but there was a discussion on here a while back about doujinshi. I’ll give you the link, and you might be able to find something from there.
There’s also a few listed in the rec category
I hope this help!
I can’t think of any off the top of my head, but I do hope you’ll find this pixiv tag page useful - if you haven’t already trawled through it