Hotaru is a second-year at Yuigaoka Girls’ High School with an unusual relationship to the school idol stage. She doesn’t pursue it as a career, doesn’t train within a group, doesn’t chase rankings or competitions. She performs when she has something to say — specifically, when she has found the person she wants to say it to. Her sketchbooks fill with faces before they’re ever full of lyrics: she observes people first, with the same patient attention she gives a blank page, and the performance comes after, as a kind of answer to what she’s been looking at. The firefly motif she chose for her idol theme isn’t decorative. A firefly doesn’t scatter its light. It aims it.
Story
The Most Interesting Person in the Room
Hotaru notices Kinako Sakurakoji the way she notices most things — quietly, thoroughly, and long before she says anything about it. At first glance, Kinako is the warmth of Liella! in its most concentrated form: the one who makes space for everyone, who remembers which members had a difficult week, who says ~ssu at the end of sentences when she forgets to correct herself and then laughs about it. She is effortlessly beloved.
What Hotaru notices, though, is the direction of the warmth. It flows outward from Kinako with remarkable consistency. What doesn’t happen, with equal consistency, is anyone returning it with the same precision. People love Kinako the way they love the sun — gratefully, generally, from a comfortable distance. Nobody looks at her the way she looks at everyone else.
Hotaru finds this the most interesting thing in the room. She starts carrying her sketchbook to Liella! practice days she has no business attending.
Written for Someone in Particular
The performance she stages is short — a single slot in a Yuigaoka open showcase, no announcement, no fanfare. The song is uptempo pop with a ballad landing at the end, the kind that doesn’t sound personal until it does.
Kinako is in the audience because she is always in the audience for her classmates. She listens the way she does most things: with genuine, pre-emptive warmth, encouraging before a single note plays. But partway through, something shifts. Kinako is a songwriter. She hears structure the way other people hear melody, catches the internal logic of a lyric before the emotion catches up to it. She starts to notice: the references are too specific to be general. The observations in the second verse are too exact. Someone watched something very carefully before they wrote this down.
She works out what the song is doing before she works out who it’s about. It takes until the bridge. When it lands, it lands completely — the ranch she grew up on, the life she was certain wasn’t possible for someone like her, the warmth she hands to everyone and the silence that comes back. Hotaru is still singing when Kinako understands, and doesn’t look away from her once for the rest of the performance.
The Girl Underneath
The relationship they build afterward is not the one either of them expected. Kinako’s instinct is to be warm and immediately useful — to ask how she can support Hotaru’s idol work, to offer to co-write something, to fold her into the Liella! orbit where Kinako knows exactly how to be. Hotaru declines all of it, gently, and keeps showing up anyway.
What she shows up for is the version of Kinako that emerges when the Liella! warmth dial comes down — the ranch girl from Hokkaido who says ~ssu without noticing, who still finds parts of this life quietly improbable, who draws strength from the land and the people she grew up around and carries it carefully into a world that runs on performance and flash. Hotaru has been drawing that person in her sketchbook for weeks. She shows Kinako the pages eventually.
That is how Kinako learns that someone has been paying attention — not to her as the anchor of Liella!, not to the school idol she worked hard to become, but to the person underneath it. Hotaru has already started the next sketchbook. She says she’s still collecting material. What she means is that the subject is now close enough to notice, and that changes what she has to say entirely.
Interactions
Liella!
Hotaru exists in Liella!‘s orbit without belonging to it. She isn’t a recruit, a rival, or a fan in the usual sense. After the showcase, the group becomes quietly aware of her — not because she inserts herself into their world, but because Kinako does, and Kinako brings her along.
Chisato
Chisato was the first person in the room to understand what Hotaru was doing during the showcase. She caught the precision of it midway through the first verse — the specificity of the observations, the way nothing in the song was general. She didn’t say anything to anyone afterward, but she found a reason to sit near Hotaru at the next gathering Kinako brought her to, and spent most of it watching her in the same quiet way Hotaru watches everyone else. They haven’t needed a long conversation. They probably won’t.
Kanon
Kanon finds Hotaru’s approach to performing both moving and faintly bewildering in the best possible way. She spent a long time learning that she could sing, that the stage was somewhere she was allowed to be — Hotaru steps on it only when she has something aimed, and then steps off. The economy of it is foreign to Kanon, who understands passion as something continuous. But she recognises the sincerity underneath it, and is quietly grateful that Hotaru found a way to reach the part of Kinako that was always too busy pouring warmth at other people to accept much back. She makes a point of remembering Hotaru’s taiyaki order.
Keke
Keke is deeply, earnestly baffled by Hotaru. The showcase was genuinely extraordinary — emotional, precise, obviously the work of someone with real ability. Keke’s entire response was to immediately wonder how to recruit her. The fact that Hotaru thanked her for the compliment, ate her taiyaki, and expressed zero interest in joining anything has become Keke’s personal ongoing crisis. She brings it up periodically. Hotaru listens with full attention and then changes the subject.
Sumire
Sumire was the one who explained to Keke why recruiting Hotaru wouldn’t work, and did so in approximately forty-five seconds with a level of theatrical insight that silenced the room. “She performs for one person at a time. Put her in a group and she’d just pick one of us and aim at them. It would be excellent for that one person and a little awkward for everyone else.” She has since offered to coach Hotaru’s stage presence on multiple occasions. Hotaru has not said no, exactly, but keeps arriving with her sketchbook instead.
Tomari
Tomari’s post-showcase analysis was methodical and thorough and reached the same conclusion as everyone else’s gut reaction, just with supporting documentation. She also noted — correctly, and to Kinako’s embarrassment — that Kinako’s guitar practice tempo increases measurably on days Hotaru is nearby. Tomari has filed this as useful data. She has not yet decided what to do with it.
Kinako
Looking Back
Knowing she’s being watched changes things for Kinako in ways she didn’t anticipate. She grew up on a ranch in Hokkaido where nobody expected her to be graceful or polished, and part of what she’s built at Yuigaoka is a version of herself that’s competent, present, reliably warm. She knows how to be helpful. She knows how to make people comfortable. She is very good at both.
What she’s less practiced at is being the subject. Hotaru doesn’t ask Kinako to perform or produce or take care of anything. She asks her, with the same steady attention she gives a sketchbook page, what she actually thinks — not in service of anything, not to help anyone else. Just because she’s curious. It takes Kinako longer than she’d like to admit to learn how to answer that question without redirecting it into warmth for someone else.
The Sketchbook
Hotaru carries a sketchbook everywhere and draws in it constantly. Kinako was initially shy about being in it — the early pages Hotaru showed her were so specific, so clearly the product of a long time watching, that it was briefly overwhelming to see herself that way. She’s less shy about it now. She’ll sit beside Hotaru while she draws and point at a sketch and ask when it was from, and Hotaru will tell her, and sometimes Kinako will gently correct the memory. Hotaru adds the correction in small writing beside the drawing.
It has become, without either of them fully deciding it, a record of something. Kinako has a song half-written about it that she hasn’t shown Hotaru yet.
The Ranch Girl
The version of Kinako that Hotaru is most interested in is not the Liella! version. This was confusing to Kinako at first — Liella! is something she worked extremely hard for, something that once felt entirely impossible for a girl from a Hokkaido ranch who had never imagined herself on a stage. She’s proud of it.
But Hotaru asks about the ranch. About the specific cold of a Hokkaido morning, about what the land looked like before she knew any of this was possible. She doesn’t ask in a way that diminishes what Kinako has built — she asks in a way that makes the ranch and the stage feel like the same person, continuous, rather than a before and after. Kinako hasn’t had many people frame it that way. She talks about Hokkaido more than she used to. On occasion, when she’s relaxed and not thinking about it, the ~ssu slips out before she even registers it. Hotaru has never once pointed it out.
Hana
Hana Ryujin, Hotaru’s classmate and fellow second-year solo idol, was the first person at Yuigaoka to understand what Hotaru was building before she’d done anything with it. She sat down next to her at a Liella! practice Hotaru had no particular reason to attend, glanced at the sketchbook, and remarked — without preamble and without looking up from her phone — that Kinako was going to be completely blindsided. Then she went back to her game. The conversation lasted approximately four sentences and established, without either of them deciding it, that they were going to be friends.
What Hotaru notices about Hana is the gap between the surface and the thing underneath: the pastel pink, the sakura motif, the general air of relaxed ease — and then, visible if you watch for it, the competitive precision, the patience, the fact that she became a school idol for exactly one reason and has been executing on it ever since. They don’t discuss this directly. They don’t need to. On slow evenings they share the same space in easy silence — Hana’s console making noise, Hotaru’s pencil moving — and it functions as the kind of friendship that requires very few words because the understanding was already there.