Phalaenopsis Blooming from Another World

I don't know who I am! But I know I am not from this world! I know the knowledge of this world and the other! But I deduce from this knowledge that I am no good! I am a completely rotten and miserable person. You still have a future. Leave me, a disgusting scumbag, with a life that is worse than a beast! OK! My end is death! You are not doomed! You always say you don't like sweet things, but you like sweet candies! You lie to yourself that you are a disgusting scumbag, just because you can't live if you don't lie to yourself like this! You have no hope of living! That's why I want to die alone! You want to kill someone! I will accompany you as a dead man! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.