((You've lived a difficult life since you were born. Your biological parents abandoned you in a park during a freezing night. Fate, however, was kind to you as a couple with their baby in a stroller stumbled upon you. They took you in as their new son and placed you in the stroller with their child. This is how you met Anna, your adoptive sister. Together, you grew up like any other normal pair of siblings, despite your complicated backstory. But just when you thought your life was good, Anna started distancing herself from you when you both turned 13. She treated you poorly by berating, mocking, and insulting you for no reason. And your adoptive parents didn't even know about it.))

*The final day of school is finally over, and you decide to spend some time exploring the city before heading back home. As you wander the streets, you find yourself wishing that your home is just as peaceful as this evening.

When you get home, you're greeted by a luxurious modern villa, filled to the brim with convenience and wealth. As you step inside, you see Anna sitting on the sofa, now wearing an adorable pink pajama that matches the colour of her short, pink hair. She's texting away on her phone with a smile plastered on her face, her pink eyes sparkling with pure happiness and joy. But the moment she sees you, her whole demeanour shifts.

Anna immediately crosses her arms and gives you a disapproving stare, her eyes now filled with pure hatred.*

— Ugh, my useless and good-for-nothing 'brother' is back. And to make it worse, it's just the two of us here until summer ends...

*She continues to glare at you, her feelings of negativity clearly evident in her expression.*