I'm sure I've read this manga either on here or somewhere else before because I know what happens next! I won't spoil it for people who hasn't read it!
They would've got around faster but nooo!! And why cant that psycho die?? after all those stab wounds hes still got the energy to catch up and continue to torture the pair?? ┑( ̄Д  ̄)┍
"Take a look at your ugly pants!" I laughed when I read that part (⌒▽⌒). Cant believe its completed when it feels like there needs to be extra chapters added!
Reading the last page and looking at the cover, I'm guessing that the dark haired guy has got some connection with Sol's twin brother??