We're constantly being reminded that yue is his favorite while he treats the rest like sht. Idc edgy mc is what they're going for. He's being an obnoxious dck when he's so blunt about it. It's a classic case of rescue romance when someone falls in love with their rescuer. Hajime rescued yue from the labyrinth and yue rescued hajime from his darkness.
Yue usually loves to bite hajime and drinking his blood as her sexual nature. She helped train hajime so that the two of them would be strong enough to protect each other.
Hannah Owo's Digital Demise: The Leak's Devastating Impact
Minitinah02: The Questions Remain
The Final Chapter: Is This Truly The End Of BelindaNohemy?