I agree with everyone here but imo EVERYONE is messed in the head, even the MC.
- The two twins are manipulative and overly obsessive about their sister.
- The MC acts the same way towards her brothers and it is hella disturbing (a GPS microship, really? And aiming blow darts at girls who go close to them?) and creepy.
- Meanwhile, Tamaki met MC one time 8 years ago and he fancies himself in love with her--stalking her, blackmailing her, and sticking his nose where it isn't wanted.
They're all trash brooo. But this story is good.