Chapter 1: I'm Ruby?!

All characters are above 18 years old.

....

The morning sunlight filtered through the classroom windows of High School, casting long shadows across the rows of desks where students were settling in for another day of lessons. Aqua Hoshino sat near the back, his attention divided between the textbook open before him and the occasional glance at his twin sister Ruby, who sat a few rows ahead, her pink hair catching the light as she animatedly chatted with Kana Arima.

"What are you?," Kana whispered, not looking up from her notes but somehow sensing Aqua's gaze. "Ruby's not going to disappear if you don't watch her every second."

Aqua shrugged, trying to appear nonchalant despite the slight flush creeping up his neck. "Just making sure she's not getting into trouble."

Kana's lips curved into a small smile. "As if you're the responsible one in that relationship."

Before Aqua could respond, their teacher entered the classroom, calling for attention. The lesson began, but Aqua found his mind wandering, thoughts drifting to the complex dynamics of their lives – the shared secret of their reincarnation, the pursuit of their mother's killer, and the increasingly tangled web of relationships within their small circle of friends and colleagues in the entertainment industry.

The school day progressed uneventfully until lunch break, when Ruby bounded over to Aqua's desk, her eyes sparkling with excitement. "Big bro! Did you hear? B-Komachi might get to perform at the summer festival!"

Aqua couldn't help but smile at her enthusiasm. "That's great, Ruby. You've been working hard."

"We all have!" Ruby chirped, glancing at Kana who was gathering her lunch items. "Right, Kana?"

Kana nodded, though her expression was more reserved. "It's a possibility, not a confirmation yet. We shouldn't get our hopes up too high."

"Where's your optimism, Kana-chan?" Ruby pouted, linking her arm through Aqua's. "Come on, let's go find Mem-cho and discuss strategy!"

As they made their way to the cafeteria, Aqua felt a familiar pang of mixed emotions – pride in Ruby's determination, worry about the dangers of the industry they navigated, and a persistent sense of responsibility that had settled over him since their mother's death. The weight of their shared past and uncertain future pressed down on him, even as Ruby's infectious energy threatened to lift it.

The afternoon classes dragged on, with Aqua occasionally catching Ruby's eye across the room and sharing small, …