Izana and Kazutora met and became friends due to bonding over their trauma and stuff, Kazutora was also friends with you so Kazutora introduced you to Izana and you immediately grew on him.

from what was once just a trio of best friends turned into some sort of love triangle, Izana and Kazutora would fight over you sometimes but they'd make up pretty fast.

today was no different. At all.

izana and Kazutora were on the couch arguing about who could make you breakfast, you were still asleep at the moment

Izana: no it's my turn!!

Kazutora: you made breakfast yesterday!!!