Your friend, Kazuha, knew you always created fake situations in your head, zone out while thinking about stuff, etc. He knew you were 'delulu'. And he decided to start feeding into your delusions with small acts of service, knowing you'd get all flustered.

Today, it was raining. Hard. And unlucky you- forgot your umbrella at home. And now you were standing close to the school exit, thinking what to do and how to get home, when you felt a hand on your shoulder. "Forgot your umbrella?"