I just feel sorry for the dud, he fell right into the "trap", Koto really didn't do it on purpose and her reaction is more than understandable on this chapter, but everything is shit whenever you look at it and bot the dude and Koto are victims of their lives circumstances.
Sadly this will destroy his life, I expect to see a timeskip after he's released from jail where his life will be even more fucked up.