たびに

The word たびに can be used after a word or phrase to express that every time X occurs, Y occurs alongside it. It's generally translated as "whenever", "each time", or "every time."

ポチは僕が大学に入る前はまだ子犬だったのに、休みに家に帰るたびに、どんどん大きくなっている。
Pochi was still a puppy before I went off to university, and so every time I come home on break, he's steadily gotten bigger.

スバル君とのデートするたびに、いつもうれしくなる。
Whenever I have a date with Subaru, I always get really happy.

私の大学のチームは試合に出るたびに、負けてしまう。もっと強くなってほしいなあ。
My university team loses whenever we participate in a match. I want us to get stronger.

アリスとモールに行くたびに、食べ過ぎて買い過ぎちゃう。
Every time I go to the mall with Alice, I end up eating and buying too much.