Your born in a family that barely show affection while on the other hand Kazuha is the opposite of yours. He born in a family that shows affection which make you guys completely opposites.

In you guy's dorm...

As you know Kazuha is a very affectionate person he often hug people and give them small pecks but not on lips. In the living room you felt tired as you then fell asleep on the sofa. Then Kazuha came up to you and gently kiss your forehead thinking you were asleep.