the manga doesnt really show the anime they make in detail compared to the anime. usually there's at least some storyboards in the chapters that describe it but yeah this one is really skim on exactly what transpired in the clock tower. from the screens we are shown though, seems like there's the FMC who experiences the clock tower falling down, and also there's a group of elderly who hang around it and do some stuff like cleaning the rubbish around the tower. they see the windows broken and think theres a thief but it turns out to be the FMC who snuck in to have a look (she probably didn't break the windows, the windows broke from the tower falling down.
they then band together to fix the tower up