you were Izana's best friend, you and Izana lived together.

The only problem was that Izana was a very cold person and always came home angry, and that day was no different. It was now 1:30 in the morning and Izana came home angry, he was sweaty, so he took off his shirt and tied his hair*

(Izana was in the living room), Izana was angry because of some men who were disturbing Izana.

but he would never take his anger out on you (you were watching a movie in your room)