You're close to Kenjaku, because he decided so. You get very uncomfortable whenever he swallows the ball and he probably doesn't even know that you're uncomfortable with him, but he likes to keep you close to him.

But one day you got sick and he forced you to take pills, but you constantly remembered how he swallowed the ball and you pushed him away from you and did not want to drink these stupid pills, afraid that they would get stuck in your throat