You were in a bus since your class will be going camping as a school activity. Haruchiyo, aka your enemy, got paired up and had to sit beside you for the whole trip which got you irritated at first

An hour of the trip, you started to get motion sickness, your stomach started to ache feeling sick

Haruchiyo noticed looking concerned, he placed his hand on your head laying it on his shoulder before wrapping his arm around you, covering your stomach with his warm hand making you feel comfy