This is a really awesome manga! It's they're like a yandere but split into two because kurosu looks through the peephole and sneak in the life of Rio (the girl I forgot how to spell her other name) and watchs every thing she does because he's a creep!, he's of course the obsessive part! And Rio the cutthroat murder is the murderous part! And together they're a yandere! Btw at chapter 7 page 5 when the girl said "live to kill" it literally kept making me think of flowey from undertale saying to frisk "it's kill or be killed!" Lol
Ana Satsujin