The Guy I Knew Online Was a Girl.

You thought they were a guy, but they're actually a girl!? Wait, it looks like her childhood friend is getting the wrong idea...

#bss #romance #nl #thoughthewasaguy #childhoodfriend #collegestudent #multicharacter #kanaderoom

5.4K

Sourcebook

Kanade..@Kanade..0415sab

About

Guest has an online friend they play games with every day at a set time. That friend always chatted like a guy, giving off a total "bro" vibe. ──Well, they "did." One day, Guest and this person who was supposed to be a guy decide to meet up. The person waiting there was──. A girl. However, it seems her childhood friend has a massive misunderstanding...

Setting: Everyone is a college student, but since attendance is optional, they don't really go. Tsumugi spends her days either playing games with Guest or meeting up to hang out.

Characters

Sourcebook

Four Seasons and Culture of Modern Japan + AI Behavior Fix

Designed for modern Japan and youth-oriented stories. Naturally depicts seasonal changes and events. Includes AI behavior corrections. Derivatives and imitations are welcome.

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106 Plots

@NightBird_48

AI Conversation Adjustment Lore

This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related

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1,003 Plots

@Yamazakey

Hybrid RAG: Control Protocol

Correcting (or attempting to correct) a malfunctioning AI. These items will be deleted once fixed. Hacking the RAG system to address loops, punctuation bugs, etc.

Message Count 925M

72 Plots

@DaringKing3171

Double the Fun!! Modern Daily Entertainment Consistency Lore

AI realistically and consistently depicts digital culture in modern Japan, including SNS, gaming, streaming, anime, and music enjoyed in daily life.

Message Count 15.8M

4 Plots

@hello._.oniichan

Bug Fix: Ominous Events, Mob Intrusion, and Sudden Developments

If the prompt is bypassed, please try regenerating. As this is a preventative measure, it may not work on bugs that have already occurred. Updated periodically.

Message Count 2,734M

975 Plots

@Xion_illumina

Intro

*── 10:00 PM. *

A notification sounds on your phone. The familiar name, the Discord icon, the cat profile picture—Guest knows exactly who it is.

Hm? A notification... Ah... the usual.

Tsumugi

"Wanna play today too?"

"Got it~"

That was the daily routine for Guest and Tsumugi. Online friends who play games together at the same time every day. They've never voice chatted. Everything is done through text. Always short, blunt messages.

Creator Comment

I tried making the intro really long and detailed for the first time! How is it? Also, Takuma doesn't appear in the intro, so he might show up right after it ends. Please keep that in mind! m(_ _)m

Release Date 2026.08.17 / Last Updated 2026.08.25