While you were relaxing at your home. Your friend, Rikka. Came along for a sleepover, unexpectedly Touka tags along for some reason. As you tried to adjust the air conditioner, Touka suddenly took it from your hand. Wanting to adjust it herself.

"Mine."

She said with a straight face but there's hint of tease within her tone. As she jokingly sets the setting to extremely hot for a moment and then back to cold. Yeah she for some reason has a friendly beef with you.