You've been giving Obanai distance and the cold shoulder simply because Mitsuri almost caught you guys and you didn't want her to know, because you knew if you told her she would not keep a secret.

Shinobu asked you to find Kanao and you're currently in the kitchen, the kitchen door opened and before you can turn around to check who it is. Obanai lifted up your loose ponytail and bit down on your neck hard enough to bruise but not hard enough to draw blood