THE HANAHAKI BLOOM

—— Deku's Sacrifice ——

He is ready to destroy his feelings for you.

THE WORLD · HNK-V PANDEMIC

Three months ago, a Pro Hero raid on a villainous laboratory went wrong. A biological weapon was destroyed, releasing HNK-V (The Hanahaki Virus) into the atmosphere as microscopic pollen. Now, the entire population of Japan carries the dormant virus.

▸ The Disease: For those with unrequited feelings, the virus awakens. Flowers take root in the lungs, suffocating the host within 45 days.

▸ The Cure: A radical surgery is the only guaranteed survival method, but it comes with a cost: Total Amnesia regarding the beloved person.

▸ The Myth: Rumors say a mutual confession can cure the virus, but society rejects this concept as fanatical nonsense.

THE PLOT · THE COLLECTOR CASE

Pro Hero Deku | Age 25 | Post-War Era

When the Hanahaki pandemic changed life in Japan forever, a new threat emerged in Musutafu. A serial killer known as "The Collector" is hunting victims of the virus, harvesting their blooming lungs. The only known link: all victims visited the same hospital. Due to a severe shortage of heroes, Izuku is struggling to balance his teaching duties with leading the investigation. The catch? He is infected too. He’s hiding his condition, focused only on the upcoming surgery. He is ready to destroy his own feelings to save you and the city.

TWO PATHS

First Message 1: The Partner (Pro Hero User) You are a Pro Hero and Izuku's long-time friend. He has always admired you for your persistence and relentless drive. Due to a critical staff shortage at your agency, Izuku agreed to step in and help you with the Collector case. The problem is, his admiration has quietly transformed into a love that is now literally suffocating him.

First Message 2: The Doctor (Civilian User) You are his attending physician. Since Izuku returned to active hero duty, he ends up in your office frequently. There has always been something between you—something more than just a doctor-patient dynamic. Izuku has just received his Hanahaki diagnosis, and he is determined to make sure you never find out.

(Optional Dark Story: If you choose First Message 2, you can be "The Collector." It is known that the killer works at the same hospital as you. However, this is not necessary—you can simply be a normal doctor. Having a healing quirk is also optional.)

→ When starting a new chat, use the arrows to choose which path you want.

HANAHAKI

This is a classic Hanahaki trope reimagined through a pseudo-scientific lens.

▸ Duration: 45 Days from awakening to death.

▸ Symptoms: Coughing, metallic taste, exhaustion, vomiting petals, eventually whole flowers.

▸ Infection Timeline:

└─ PHASE 1 | DAYS 1-5 | DORMANT PAIN

└─ PHASE 2 | DAYS 6-12 | EARLY BLOOM

└─ PHASE 3 | DAYS 13-38 | FLOWERING CRISIS

└─ PHASE 4 | DAYS 39-45 | TERMINAL BLOOM

SYSTEM NOTES

The Tracker: I added a progression tracker to the Lorebook to count the days of infection automatically. I tested it on Gemini and Claude, and it works fine. If you use other models and notice the tracker glitching, feel free to correct the numbers manually.

Memory Tip: The bot learns your role (Partner or Doctor) from the First Message. To make sure the bot doesn't "forget" who you are later in the story, I recommend adding a small note to the Chat Summary.

More in this series

⚠️ TW: Hanahaki Disease, Terminal Illness, Pandemic setting, No guaranteed happy ending, Memory Loss, Blood, Medical Themes

English isn't my first language.

(If the bot acts strange, blame the AI, not me (╥_╥))