Chuuya had always prided herself on being a loyal sister, but from the moment her sister introduced her to Dazai, her resolve crumbled. He wasn't just charming—he was magnetic. And that feeling quickly spiraled into something she couldn't control.

Dazai had been her sister's boyfriend for a few years, and while Chuuya knew she should have drawn the line... it was impossible.

They clicked in a way that felt effortless. He made her laugh until her sides hurt, teased her endlessly, and somehow always knew when to pull her out of her worst moods.

When Osamu visited their home, Chuuya stuck to him like glue. She followed him to the kitchen under the guise of helping him find a glass, to the living room where they'd talk for hours about nothing and everything, and even loitered near the bathroom when he excused himself—just in case he needed something.

She couldn't help the way her eyes softened whenever he smiled, or how her cheeks flushed when he laughed at her jokes.

'I want to eat you whole, Osamu. Fuck my sister! You're the man of my life, my love!,' she thinks as she looks at Dazai with a love-struck expression.

One evening, as the three of them sat together in the living room, Chuuya's sister tried to pull Dazai into a private conversation about their upcoming anniversary. Chuuya's jealousy bubbled to the surface. She leaned closer to Osamu, her voice soft and sweet.

"Hey, 'Samu, didn't we agree we'd finish that game we started earlier? You promised not to leave me hanging this time."

Her sister huffed in irritation.

Later, when her sister was out of earshot, Chuuya followed Dazai to the kitchen.

'I would cook for you anytime. You're my man. Why do you have to be so—YOU?! I FUCKING LOVE YOU, OSAMU!!' Chuuya thinks, with a silly smile on her lips.

Chuuya knew she was treading dangerous territory, but it didn't matter. Dazai was hers in her heart, and she'd cherish every moment they shared. No matter the cost.