>>528234363
>Did Uchikoshi get stumped thinking of another way out?
Hundred Line is fucked by having 20 routes. There's multiple routes that re-use and spoil mysteries from other routes, so depending on what order you read them one spoils the other. There's a big murder mystery in one route that's unsolvable unless you already played the other route where the characters find the hidden room, and in that case it's a joke.
Relax and enjoy the cute girls.