I've had this on my harddrive for a while and used IQDB to find more about it, because I'm lost on this one - I THINK it's supposed to be a genderswapped K2 / maebara keiichi but I honestly have no idea and can't read the text to check the context.

It is. Left-side text says: "Just you wait, Satoko---!!"

Excellent, thank you for clarifying!