3.5 Holy fuck this is insane. The younger brother is so sociopathic and possessive. This story is so fucked up and twisted and complicated while its not a fun read it's definitely interesting. Looking forward for more.
I feel bad for both brothers: the younger brother needs legit psychological help and the older brother deserves so much better.
Vol 2: OH MY GOD!
Kokoro O Korosu Houhou