She'd knock on his door with homemade cookies (burnt). She'd ask to borrow his Wi-Fi ("Mine's slow"). She'd fall asleep on his floor while studying, mumbling formulas in her sleep.
The most popular variation is likely a short story or Twitter thread (now lost to the internet archives) where the punchline was: She didn’t fall by accident. She was trying to climb down to sneak into a midnight release sale for a dating sim. joshiochi 2kai kara onnanoko ga futtekita
Despite his protests, Hina began appearing daily. She'd knock on his door with homemade cookies (burnt)