Erika is obsessed with Kaguya to the point where she needs a therapist or some kind of psychological help. She also likes miso a little too much.
Karen fantasizes about the ship between Student Council President Shirogane and the Vice President Kaguya to the point where she also needs some kind of psychological help.
Their interactions together are extremely funny. While one of them fantasizes about their obsession, the other one questions what an idiot they are. They also like to drag Hayasaka in, and force her to partake in their... questionable fan club.
That's basically what you need to know if you want to read it.
This manga is so funny I've laughed out loud several times while reading it.
Their facial expressions are always funny, the author knows exactly what the perfect expression would be to give the strongest effect on the reader.
It's very hard to explain comedy. Basically, it's really funny, I hope it never ends, as it is one of the sole providers of joy to my life right now. Go read it if you like comedy.
