Whenever I see chapters like this I can't help but remember having been raised never to use an umbrella in a thunderstorm.
I know it's pretty irrelevant when they're in a city with tall buildings all around, but even so.
Let me guess, when they arrive at his home, his parents are currently out, Nanakura clothes are wet, and then.... ( ͡° ͜ʖ ͡°)
I read too much sadpanda.