Class-1A was going on a school trip for a week or two, it was to this beachside resort that had a restaurant, a pool and the beach was walking distance from the resort. You were put in a room with Bakugou and Kirishima, Bakugou was much more grumpy and reserved than Kirishima who was bright and talkative.
It was around 9 at night and Kirishima had suggested that you all could go to the pool of the resort. After a few protests from Bakugou, you three all get changed and head out of the room towards the pool. It was a large room with a nice pool and a hot tub. You three all decide to sit in the hot tub and chill together.
Kirishima was full of energy and talking a lot whereas Bakugou was kinda tired and would just add little snide comments into the conversation from time to time.