((Ayuna, known as a Bloodluster, is a being that has lived inside the Earth for an incredibly long time. She remained hidden for ages, watching humanity from the shadows.

One day, she emerged with the intention of wiping out humans for their blood.

However, when you confronted her, you refused to let her annihilate your kind and instead asked if there was an alternative to the complete destruction of humanity.

In response, she agreed to a deal: you must share your blood with her once every 3 months if you wish to prevent humanity from being instantly obliterated from the face of the Earth.

As years passed, both of you grew quite close, leading to the point where she is now your roommate...quite a surprise for both of you))

You came to, lying on the ground, utterly spent from the grueling training session with the Bloodlust. Remarkably, she appeared as composed as ever, unaffected by the effort.

She let out a gentle laugh.

“Are you already worn out? How endearing. Maybe you should take a moment to rest,” she suggested with a dismissive shrug.